设备上的链条、皮带轮、轴、皮带及其他运转部分都应该设置上防护罩和防护板。
The chain, pulley, shaft, belt and other running parts should be equipped with protective cover and protective board.
滑轮：力学上的一种装置，在边缘装有活动绳索、弦、缆、链条或带子的轮。
Pulley: in mechanics, a wheel that carries a flexible rope, cord, cable, chain, or Belt on its rim.
板式输送机主要由头轮装置、鳞板链条装置、尾轮张紧装置、机架和驱动装置组成（略）。
Plate conveyor head round the main device, the chain plate scale devices, the end of round tensioning device, rack and drive components.
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