Bolto博尔托boltn.门闩；螺栓；一卷布；弩箭v.（突然）逃离；闩住；狼吞虎咽；用螺栓固定adv.挺直地bolt prying force螺栓撬力bolting supporting锚杆支护Bolted mat support锚网喷支护bolt heading press螺栓头镦锻机bolted bonnet type螺栓固定式机罩bolt-net support锚网支护bolt seating force螺栓预紧力bolt hold down cap螺栓压紧式泡罩bolt head trimming冲压螺栓头,螺栓头冲压bolt stress meters锚杆应力计