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street elbow
compr.	内外螺纹弯头
construct.	异径弯头管
dril.	带内外螺纹的弯管接头
ecol.	街道转弯用弯管
oil	异径弯头
tech.	内外接弯头; 弯管接头; 异径弯管; 长臂肘管; 异径肘管