main steam valve
常见例句
- First: to act as an automatic non-return valve by preventing a backflow of steam from the main steam header to the boiler.
首先，能過作爲一個自動逆止閥，防止蒸汽從主蒸汽加熱器上倒流到鍋爐裡。 - The design and principle of working in the invention steam from traditional oil pump. The main components, as cylinder plug, oil valve, oil clumber-controlled muff, are same with the traditional.
該泵的設計和工作原理源於傳統油泵，主要部件如柱塞、油閥、油量控制套筒和傳統油泵相同。
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