threaded adapter 中文意思是什麼
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The 775qt series features a modular design which facilitates maintenance and assembly by retaining the spring load. check modules are threaded into the valve adapter for leak proof operation
775qt系列特點是模塊化結構，通過保留彈簧負載簡化維護和組裝。止回閥模塊通過螺紋旋進閥門適配器內，提供無泄漏運行。
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