常見例句雙語例句Ductile cast iron piping is used for external underground. The pipe should be spigot and socket joint connected.室外地下管網使用球墨鑄鐵管,承插式連接。The paper introduces design principle of pipe well using socket and spigot connected cast iron pipes as pipe material. The results are effective.論述了承插式鑄鐵管作井管的優(yōu)點和設計原理,實踐證明效果良好,值得推廣。 返回 spigot and socket pipe