power valve的用法和樣例：
例句
- This tendency implies a relation with the internal resistance of each type of power tube.
這種傾向意味著(zhù)與每種功率管內有關(guān)。 - Heater can be designed into double power tubes and single power tube according to the customers request.
加熱器可根據用戶(hù)的要求設計成雙功率管和單功率管。
