常見例句

• No downstream shutoff valves are allowed.
  不允許有下游關閉閥。
• FLIGHT CONTROLS HYDRAULIC SHUTOFF VALVES.
  飛行操縱液壓關斷活門。
• Machined seat allows tight shutoff.
  機械閥座,可實現(xiàn)氣密性關閉。
• Close the shutoff valve upstream of the regulator.
  關閉調(diào)節(jié)閥上游的關斷閥。
• Start Up: The downstream shutoff should be closed.
  啟動：下游關閉閥應該處于關閉狀態(tài)。
• Purpose: To test shutoff #2 for tightness.
  目的：檢測關閉2號的緊固密封性。
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