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在全国农业展览会国营农场馆里,展出了冀衡农场陆俊起同志创造的活塞环扩张器。据讲解员说,利用活塞环扩张器安装一套活塞环,只要5分钟,提高效率5倍。活塞环扩张器用铝和铁皮制成,很轻巧, 其构造如图(1)及图(2)所示。扩张器体用铝铸成,其尺寸可以依照活塞环的大小来决定。把手用白铁皮制成,用螺钉固定在扩张器体上。扩张叉装在扩张器体的前方,叉子的尖端伸入扩张器体
National Agricultural Exhibition in the state-run farm museum, exhibited at Ji-heng farm Lu Junqi comrade created piston ring expander. According to the interpreter, using a piston ring expander to install a piston ring, it takes only 5 minutes to increase the efficiency 5 times. Piston ring expander made of aluminum and metal, it is lightweight, its structure shown in Figure (1) and Figure (2) below. Dilator body cast aluminum, its size can be determined in accordance with the size of the piston ring. Handle made of white metal, with screws fixed to the dilator body. Expansion fork mounted in front of the dilator body, the tip of the fork into the dilator body