691664.com Site Title

北京雅克管道工程科技有限公司|腐蚀监测仪器|电化学仪器|管线防腐层检测仪器|防水材料

691664.com Meta Description

北京雅克管道工程科技有限公司成立于2004年04月06日，注册地位于北京市昌平区未来科学城南区蓬莱苑南街1号院7号楼911-2室，法定代表人为陈少松。经营范围包括一般项目：技术服务、技术开发、技术咨询、技术交流、技术转让、技术推广；工程管理服务；工程和技术研究和试验发展；工程技术服务（规划管理、勘察、设计、监理除外）；工业工程设计服务；会议及展览服务；新材料技术研发；信息技术咨询服务；防腐材料销售；涂料制造（不含危险化学品）；涂料销售（不含危险化学品）；金属材料制造；金属材料销售；电子测量仪器制造；电子测量仪器销售；电工仪器仪表制造；电工仪器仪表销售；电子产品销售；机械设备销售；高性能纤维及复合材料制造；高性能纤维及复合材料销售；仪器仪表制造；仪器仪表销售；货物进出口；技术进出口。（除依法须经批准的项目外，凭营业执照依法自主开展经营活动）许可项目：建设工程施工；施工专业作业；建设工程设计；建设工程质量检测；建设工程勘察。（依法须经批准的项目，经相关部门批准后方可开展经营活动，具体经营项目以相关部门批准文件或许可证件为准）（不得从事国家和本市产业政策禁止和限制类项目的经营活动。）北京雅克管道工程科技有限公司对外投资2家公司，具有2处分支机构。

691664.com Test Results

691664.com Mobile Performance: 77/100
Quick overview:
Diagnostics
More information about the performance of your application. These numbers don't directly affect the Performance score.
Efficiently encode images
Potential savings of 84 KiB
Optimized images load faster and consume less cellular data. Learn how to efficiently encode images.
Avoid multiple page redirects
Potential savings of 630 ms
Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.
Largest Contentful Paint element
5,580 ms
This is the largest contentful element painted within the viewport. Learn more about the Largest Contentful Paint element
Serve images in next-gen formats
Potential savings of 558 KiB
Image formats like WebP and AVIF often provide better compression than PNG or JPEG, which means faster downloads and less data consumption. Learn more about modern image formats.
Properly size images
Potential savings of 564 KiB
Serve images that are appropriately-sized to save cellular data and improve load time. Learn how to size images.
Eliminate render-blocking resources
Potential savings of 0 ms
Resources are blocking the first paint of your page. Consider delivering critical JS/CSS inline and deferring all non-critical JS/styles. Learn how to eliminate render-blocking resources.
Serve static assets with an efficient cache policy
25 resources found
A long cache lifetime can speed up repeat visits to your page. Learn more about efficient cache policies.
Image elements do not have explicit `width` and `height`
Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions
Max Potential First Input Delay
690 ms
The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric.
Time to Interactive
5.7 s
Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.

691664.com Mobile SEO: 100/100
Quick overview:

691664.com Mobile Best Practices: 79/100
Quick overview:
Trust and Safety
Does not use HTTPS
27 insecure requests found
All sites should be protected with HTTPS, even ones that don't handle sensitive data. This includes avoiding mixed content, where some resources are loaded over HTTP despite the initial request being served over HTTPS. HTTPS prevents intruders from tampering with or passively listening in on the communications between your app and your users, and is a prerequisite for HTTP/2 and many new web platform APIs. Learn more about HTTPS.
Does not redirect HTTP traffic to HTTPS
Make sure that you redirect all HTTP traffic to HTTPS in order to enable secure web features for all your users. Learn more.
691664.com Mobile Accessibility: 82/100
Quick overview:
Best practices
These items highlight common accessibility best practices.
`[user-scalable="no"]` is used in the `<meta name="viewport">` element or the `[maximum-scale]` attribute is less than 5.
Disabling zooming is problematic for users with low vision who rely on screen magnification to properly see the contents of a web page. Learn more about the viewport meta tag.
Contrast
These are opportunities to improve the legibility of your content.
Background and foreground colors do not have a sufficient contrast ratio.
Low-contrast text is difficult or impossible for many users to read. Learn how to provide sufficient color contrast.
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