draw-in collet chuck
... Draw-in collet chuck 内弹簧夹头 three-jaw draw-in type chuck 三爪内拉簧式夹盘 used in chuck 卡头装夹 ...
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该装置将试样通过上、下夹头安装在主承力框架内，利用弹簧对试样施加轴向载荷，使试样承受恒定的拉伸应力。
The specimen was put in framework by top and bottom fixture and constant tensile load was applied by spring.
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