便携式手持动力工具。手柄部位振动量的测量。第7部分：具有冲击，冲力和棘轮传动动作的扳手，螺锥和螺母拧紧器。
Hand - held portable power tools. measurement of vibrations at the handle. part 7: wrenches, screwdrivers and nut runners with impact, impulse or ratchet action.
英发企业股份有限公司成立于1978年为致力于传统扳手、棘轮扳手、套筒以及工具组。
INFAR industrial Co. LTD., found in 1978, which is mainly manufacturing in wrench, Geartech wrench, socket, and tool set business.
杭州宏钰气动工具有限公司是一家专业制造气动工具产品的生产企业，主要产品包括气动扭力扳手、棘轮扳手、风磨、气钻、气铲、抛光机等系列；
Hangzhou Hongyu Air Tools Corporation is a manufacturer specializing in Air tools, including product lines of Air lmpact Wrenches, Air Ratcheting Wrenches, Air polishers.
杭州宏钰气动工具有限公司是一家专业制造气动工具产品的生产企业，主要产品包括气动扭力扳手、棘轮扳手、风磨、气钻、气铲、抛光机等系列；
Hangzhou Hongyu Air Tools Corporation is a manufacturer specializing in Air tools, including product lines of Air lmpact Wrenches, Air Ratcheting Wrenches, Air polishers.
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