例句與造句

1. Like four-stroke ship engines ( some of which are also reversible ) they use mechanically operated valves, so require additional camshaft mechanisms.
2. Around 1911 the frame was modified to make the engine lower, and in 1912 the automatic inlet valves were replaced by mechanically operated valves.
3. He followed this with Saint-Blaise in 1904; von Martini relied on a licence from Rochet-Schneider of France, using an armored wood chassis and mechanically operated valves.
4. It's difficult to find mechanically operated valve in a sentence. 用mechanically operated valve造句挺難的