This includes electric grinders fitted with a clutch that disengages the disc if it becomes jammed, and compressed air grinders that stall rather than kick back.

• 这包括装有离合器的电动角磨机（如果砂轮片被卡住可将其脱开），以及压缩空气角磨机（它是停转/失速而不是反转/反向）？