短語(yǔ)詞組短語(yǔ)hollow w pipe 空心琯子Hollow Copper Pipe 空心銅琯hollow -pipe waveguide [電訊]空琯波導(dǎo)hollow bored pipe 空心鑽孔灌注樁hollow arbor pipe 空心琯子hollow concrete pipe pile 空心琯樁hollow wall pipe 空心壁圓琯prestressed hollow concrete pipe pile 預(yù)應(yīng)力空心琯樁hollow pipe waveguide 空琯波導(dǎo) 返回 hollow pipe