return manifold block回油岐管座
return corner block转角砌块
return accelerator filler block复进加速器垫块
block return挡球回击
Return speed of slide block滑块回程速度
breech block return spring枪膛回力弹簧
inertia block return spring惯性体复进簧
swinging block quick return motion摆杆急回运动