So what's going to happen is I'm going to use my wrench, and I'm going to put the bolt -- or screw the bolt into the wall.

所以接下来会发生的是我要用我的扳手，然后我要放螺栓——或者把螺栓拧到墙上。

It was necessary to plan the making of every part to the minutest detail, to have each part machined to its exact size, and to have every screw, bolt, and bar precisely interchangeable.

有必要计划每个零件的制造到最细微的细节， 将每个零件加工到其精确尺寸， 并使每个螺钉、螺栓和杆都可以精确互换。