internal rope thread
常见例句
- The separate flushing(air) system can be connected with shank adaptors by internal or external rope thread or trapezoidal thread . The customers can order according to their own requirements.
旁側供水（風）系統釺尾有內外波形、梯形螺紋連接，用戶可根據需要單獨訂貨。
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