我们现在可以非常清楚地听到他们沉重的脚步声。We could now very plainly hear their heavy tread.我的心怦怦直跳。脚步声已停在我的门外。My heart was hammering. The footsteps had stopped outside my door.所有的人都竖起耳朵听楼梯上传来的脚步声。All ears were cocked for the footsteps on th...
卸下通风窗4后, 松掉锁紧螺母5上的锁紧螺钉.Unload the wind window 4, loosen the lock screw of nut 5.温室大型通风窗重达上百公斤,带来了一系列问题.Large windows under the weigh of more than 100 kg are a burden to operate.分析了车厢侧板零件通风窗冲压加工的工艺特点, 设计了一副针对该零件加工的切口拉伸复合模...