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恒安勾型扳手:又称月牙形扳手，俗称勾扳子，用于拧转厚度受限制的扁螺母等；专用于拆装车辆,机械设备上的圆螺母,卡槽分为长方形卡槽和圆形卡槽.
适用圆螺母的外径范围:S:22~26 S:28~32 S:34~36 S:38~ 42 S:45~52 S:55~62 S:68~72 S:78~85 S:90~95 S:100~110 S:115~130 S:135~145 S:150~160 S:165~170 S:180~200 S:200~220 S:240~260 S:260~280 S:280~300 S:300~320 S:320~350 S:360~380 S:380~400 S:400~420另外可定做各种大型重型勾扳手
勾型扳手制作工艺：使用优质合金钢经高温锻打而成，强度高，耐磨。
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