Is the compactor operation certificate in other places useful? Validity period of construction worker certificate?

Notice on Closure Construction of Lianhu Bridge

[job search] 14 construction / engineering consulting enterprises recruit project business leaders / leaders of civil engineering budget and

The “business hall” on the scaffold and the “little lucky” in the cold winter

Save 100 days! Typical example of “full insertion” construction

Construction progress of Youran landscaping Zhumadian Xinhui residence

People’s livelihood face-to-face | enclosure removal, and the construction section of Shengli road has been passed

Scaffold collapse at a construction site in Guangdong, workers fall: 8 dead and 1 injured