SWMC 370 subsurface drilling rig tau ua tiav lub hauv paus grouting project ntawm ib qhov project av hauv Guangzhou, Suav teb.Qhov project vaj tsev nyob hauv Guangzhou npog thaj tsam ntawm 62,000 m2, ntawm uas 44,000 m2 yog saum toj no thiab 18,000 m2 yog underground.Muaj 25 plag tsev saum av...
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