vertical wedge cut 垂直楔形掏槽 ; 立面楔形开挖
double-wedge cut [矿业] 双楔式切挖
double wedge cut 双楔形掏槽
Hidden wedge cut out-in 镂空填充设计隐形坡跟
wedge cut with slab holes 带辅助眼的楔形掏槽
vertical l wedge cut 垂直楔形掏槽
Cut vertical wedge 立面楔形开挖
wedge-shaped cut 契形掏槽
wedge shaped cut 楔形掏槽
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