3、对工地的电工、电焊、架子工及特种设备作业人员要持证上岗；

• Keep it short and easy to remember.
• Use keywords related to your blog's topic.
• Avoid using hyphens or numbers.
• Make sure it's available (you can use a domain registrar's search tool to check).

　　**来，**国际贸易公司先后承办了**市奥运场馆建设项目；城市地铁1号线、5号线、4号线、10号线、奥运支线改造和建设项目；首钢集团京唐钢铁厂建设项目；城市天然气

• Keep it short and easy to remember.
• Use keywords related to your blog's topic.
• Avoid using hyphens or numbers.
• Make sure it's available (you can use a domain registrar's search tool to check).

• Keep it short and easy to remember.
• Use keywords related to your blog's topic.
• Avoid using hyphens or numbers.
• Make sure it's available (you can use a domain registrar's search tool to check).

　　2、对所有现场危险源和特种设备操作的地方要设安全警示标牌和操作规程图牌；