闭杆
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clamp closing lever 钳口闭合杆
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Flip lever leg locks make opening, positioning and closing fast and easy.
翻转式扳扣式脚管锁使得脚架打开，定位和闭合迅速而简单。
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You can not add assistant lever to the hand wheel. Clockwise turn of hand wheel means the closing of valve, otherwise it means opening.
操作时手轮顺时针旋转为阀关，反之为开，不得在手轮上再增加辅助杠杆。
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