Detroit Pistons: Walter Herrmann, Allen Iverson, Antonio McDyess, Fabricio Oberto, Rasheed Wallace.底特律活塞隊(duì): 赫爾曼, 艾弗森,麥克戴斯, 奧伯托, 拉希德華萊士.The pistons are graphite-coated to reduce friction.活塞上涂了一層石墨以減小摩擦力。Some pistons have s...
The pistons are graphite-coated to reduce friction.活塞上涂了一層石墨以減小摩擦力。Some pistons have seating rings of metal or leather.有些活塞上有金屬或皮革的密封環(huán).A pump uses valves and pistons.泵使用閥和活塞....