刀卷口了。
The edge of the knife is turned .
在浅覆盖层花岗岩地区进行钢管桩施工，存在易偏位、桩尖易卷口和进度慢等技术难题。
When installing steel tubular piles in regions where granite is shallowly overburdened , the piles are easy to deviate and the pile tip is easy to warp , resulting in slow driving .
卷口