(1) When setting up poles, it is strictly prohibited to mix steel pipes with different outer diameters.
spherical head magnetic former
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Temporary employment of scattered workers has resulted in positive cases on the construction site! The general construction contractor has
Kajima Construction: the design and construction general contracting mode and practice of Japanese Enterprises
20 construction processes and practices of famous enterprises (post cast strip, structural column, waterstop, etc.), page 55 can be
