（）(夹子)havebeenusedup. A: Clamps B: Bars C: Pads D: Plates
（）(夹子)havebeenusedup. A: Clamps B: Bars C: Pads D: Plates
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（）(夹子)havebeenusedup. A: Clamps B: Bars C: Pads D: Plates