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