“underhand stoping”簡單造句，underhand stoping造句子

1、Overhand stoping indicates working from a lower to an upper level; underhand stoping is the opposite, from an upper level to a lower level.

2、There are several techniques for working the face of the stope. Overhand stoping indicates working from a lower to an upper level; underhand stoping is the opposite, from an upper level to a lower level.