摩托车发动机气门相位测量装置的设计开发。
Design and develop the device of motorcycle engine valve phase measuring system.
结合实例，对城市天然气门站的消防设计进行探讨。
The fire control design of natural gas city gate station is discussed with an example.
结合实例，对城市天然气门站的消防设计进行探讨。
The fire control design of natural gas city gate station is discussed with an example.
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