The first one is a 600 * 800 concrete support, with an 800 * 1200 crown beam installed at the top of the SMW pile.
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The construction team dug up a lot of silver dollars, which the old man said was left by his grandfather,
[quality life] the construction of West Extension Project of Shahe River of the Ninth Design and Research Institute stepped up
Comparison of Four Common Scaffolding Technologies: Coupler Type, Bowl Type, Socket Type, and Direct Insert Type
