例句與造句

1. Valve interlocks are permanently mounted to manual and motor operated valves and the closure door.
2. All these causes are directly related to improper operation of the process valves and the closure door.
3. The Silo closure door weighed 780 tons and was locked down with hydraulically operated locks, and raised on hydraulic jacks.
4. It's difficult to find closure door in a sentence. 用closure door造句挺難的