someone who works on a building site (= an area of land where something is being built) whose job is to make sure that vehicles and heavy machinery are used correctly and safely

We had to have a banksman for the crane. 我们得找一名工地机械监督员来负责起重机。

someone who works at the top of a shaft (= tunnel) or pit (= hole) at a mine (= a place where coal or another mineral is dug out of the ground) and is in charge of the device that is used to move workers, coal, etc. up and down

My grandfather was a banksman, in charge of the cage at the mine pithead. 我的祖父是一名矿坑口监督员，负责管理矿坑口的罐笼。