常啮合齿轮 constant mesh gear ; normally engaged gear
常啮合齿轮锁环 normally engaged gear lock ring
主动常啮合齿轮 normally engaged driving gear
空转轴常啮合齿轮 idler shaft constant mesh gear
经常啮合齿轮 Constant mesh pinion
牙嵌式常啮合齿轮 dog engaged constant mesh gears
常啮合齿轮传动 constant mesh transmission
常啮合齿轮变速箱 constant mesh gear box
啮合套式常啮合齿轮 dog engaged constant mesh gears
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