Access zmdz.com. 镇江中煤电子-煤矿安全监控系统,煤矿瓦斯监控系统,煤矿监控系统,KJ101N系统,各类矿用传感器,红外甲烷,红外管道甲烷,二氧化碳,二氧化硫，氢气,氧气,硫化氢

zmdz.com screenshot

70

Performance

Renders faster than
81% of other websites
52

Accessibility

Visual factors better than
that of 21% of websites
58

Best Practices

More advanced features
available than in
19% of websites
62

SEO

Google-friendlier than
22% of websites

First Response

4.6 sec

Resources Loaded

79.2 sec

Page Rendered

1.1 sec

zmdz.com screenshot

About Website

Visit zmdz.com now to see the best up-to-date Zmdz content for Germany and also check out these interesting facts you probably never knew about zmdz.com

镇江中煤电子有限公司是全国煤炭安全监控系统制造业的知名企业，符合AQ6201-2006煤矿安全新标准,从事煤矿安全监控系统、矿用传感器的研发和生产,新研发和生产了矿用传感器,红外甲烷,红外管道甲烷,二氧化碳,二氧化硫，氢气,氧气,硫化氢

Visit zmdz.com

Key Findings

We analyzed Zmdz.com page load time and found that the first response time was 4.6 sec and then it took 80.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 95% of websites can load faster. Unfortunately, there were 66 request timeouts, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

name

value

score

weighting

FCP (First Contentful Paint)

Value1.5 s

96/100

10%

LCP (Largest Contentful Paint)

Value14.6 s

0/100

25%

SI (Speed Index)

Value5.3 s

58/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.032

100/100

15%

TTI (Time to Interactive)

Value1.5 s

100/100

10%

zmdz.com

4569 ms

style.css

774 ms

pd.js

2627 ms

product_show_gd.js

401 ms

banner1.jpg

19602 ms

Our browser made a total of 163 requests to load all elements on the main page. We found that 89% of them (145 requests) were addressed to the original Zmdz.com, 5% (8 requests) were made to Count.knowsky.com and 2% (3 requests) were made to Hm.baidu.com. The less responsive or slowest element that took the longest time to load (20.5 sec) belongs to the original domain Zmdz.com.

Content Size

2.4 MB

After Optimization

1.5 MB

In fact, the total size of Zmdz.com main page is 2.4 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 25% of websites need less resources to load. Images take 2.2 MB which makes up the majority of the site volume.

HTML Optimization

-91%

Potential reduce by 188.0 kB

Original 207.0 kB
After minification 182.3 kB
After compression 19.0 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. This page needs HTML code to be minified as it can gain 24.7 kB, which is 12% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 188.0 kB or 91% of the original size.

Image Optimization

-30%

Potential reduce by 638.9 kB

Original 2.2 MB
After minification 1.5 MB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Obviously, Zmdz needs image optimization as it can save up to 638.9 kB or 30% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-70%

Potential reduce by 12.6 kB

Original 18.0 kB
After minification 16.4 kB
After compression 5.4 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 12.6 kB or 70% of the original size.

CSS Optimization

-0%

Potential reduce by 0 B

Original 3.6 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered.

Requests Now

95

After Optimization

60

The browser has sent 95 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zmdz. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Issues

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

These are opportunities to improve the interpretation of your content by users in different locales.

High

<html> element does not have a [lang] attribute

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

High

<object> elements do not have alternate text

Areas of Improvement

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

High

Displays images with incorrect aspect ratio

High

Serves images with low resolution

High

Browser errors were logged to the console

Search Engine Optimization Advices

Format your HTML in a way that enables crawlers to better understand your app’s content.

High

Image elements do not have [alt] attributes

High

Document uses plugins

Language and Encoding

Language Detected

ZH
Language Claimed

N/A
Encoding

GB2312

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Zmdz.com can be misinterpreted by Google and other search engines. Our service has detected that Chinese is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Zmdz.com main page’s claimed encoding is gb2312. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

zmdz.com

Open Graph description is not detected on the main page of Zmdz. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: