螺丝起子，改锥，螺丝刀
bolt driver是什么意思
1. 螺丝起子, 改锥, 螺丝刀：bolt down || 狼吞虎咽 | bolt driver || 螺丝起子, 改锥, 螺丝刀 | bolt face || 枪机, 枪栓