It's a mean of geotechnical investigation, including borehole surveying, costeaning, trenching exploration, test pitting, hole exploration, geophysical exploration and penetration sounding.
程勘察的一种手段，包括钻
、井、槽、坑、洞以及物、触等。
,掘井勘,掘井勘It's a mean of geotechnical investigation, including borehole surveying, costeaning, trenching exploration, test pitting, hole exploration, geophysical exploration and penetration sounding.
程勘察的一种手段，包括钻、井、槽、坑、洞以及物、触等。
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