The vertical feed fly saw, equiped on most straight welding pipe sets, can not be suitable to cut square shaped pipes because of serious deformation on the cut face.
当前一些直缝焊管机组所配备的垂直进锯型飞锯因易造成切断端面严重变形，不适合锯切正位生产的方矩型类管材。
Pipe end its shape is divided into tube, square tube, rectangular tube, oblate tube, P-shaped pipe, rectangular pipe.
钢管因其端部外形又分成圆管、方管、矩形管、扁圆管、P形管、异型管。
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