When the gears are engaged， This large gear turns the small one to rotate the cylinder . 这个大齿轮动员小齿轮使滚筒旋转， They do not go ahead when the differential is smashed . 差速齿轮撞坏了，又使汽车连续运动， The gears are locked . 齿轮卡住了， This has been implications for the specification of case depth for gears . 这一情况已影响到齿轮硬层深度技术条件简直定，，他们没法往前开， The two cogwheels are engaged . 这两个齿轮啮合在一起， the crankshaft keeps the car moving . 而曲轴，在齿轮箱挂挡时， The two cogwheels engaged and the machine started . 那两个齿轮一啮合， The impellers are kept in their proper relationship to each other by spur gear . 液轮之间借助于正齿轮连结相互正常的关系， Oil may be forced out through the timing cover and rear-main bearing oil seals . 机油会从正时齿轮盖和后主轴承油封处压出， He had attached a wheel with notched rim to the clock . 他把一个带有暗语的齿轮安在钟上，机器就启动了， ，。