twin single pump 中文意思是什麼
twin single pump
解釋
單作用雙聯泵-
Tooth interference of single - threaded trapezoidal rotor profile and fixed pitch screw in dry twin screw vacuum pump
單頭等螺距梯形齒螺桿轉子型線的干涉問題研究 -
Twin single pump
雙聯單作用泵
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