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stretching screw
archit. 张拉螺丝
met. 拉紧螺丝; 调整螺丝
tech. 张拉螺杆; 拉紧螺钉; 扩张螺丝; 夹紧螺钉; 调整螺杆; 伸缩螺丝
transp. 调整〔拉紧〕螺杆