seamless FONT> A> types are as follows: (1) general structure, Mechanical structure with seamless (GB8162-87) (2) in low-pressure boiler with seamless (GB/T3087-1999) (3) with seamless high-pressure boiler ST45.8/111 (GB5310-85) (4 ) With seamless transmission fluid (GB/T8163-1999) (5) cold rolling or cold drawing seamless precision (GB3639-83) (6) with the geological drilling pipe (YB235-70) (7) oil drilling pipe FONT> A> (YB528-65) (8) hydraulic cylinder diameter with seamless precision tube Pipe (GB8713-88) (9) Seamless special fertilizer (GB6479-86) (10) with possession of the ship (GB5312-85) (11) oil pipe cracking (GB9948-88) (12) all kinds of alloy tube 16Mn 27SiMn 15CrMo, 35CrMo 12CrMov 20G 40Cr, 20Gr, Gcr15 P>