由机动玩具的马达，齿轮箱，和离合器发出的声音。
轮马达齿轮箱裂纹修复是轮马达修理中的一大难题，长期未能解决。
It is a big difficult problem to repair the crack of gear box if wheel motor in wheel motor repairing.
输送机驱动马达应每VFD电气规格与编码器，齿轮箱，联轴节，安装硬件的完整驱动。
The conveyor motor shall be driven by a VFD per the Electrical Specification complete with encoder, gearbox, couplings, and mounting hardware.
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