大厚度铝构件
heavy thickness aluminum components
大厚度钢板
Large thickness steel plate
大厚度法兰
Flange with Large thickness
大厚度回填砂
unconventionamly thick backfilled sand
大厚度半刚性基层
Heavy semi-stiff foot layer
大厚度坚硬岩层
hard and massive overlying strata
大厚度自重湿陷性黄土
self weight collapse Loess with big thickness