1, nume:Ţ增强型植被指数de foraj API 5 dp 2, Lungime: R1, R2, R3 3, OD: la 2-3/8 la 6-5/8 4,研究生:G105, R780, S135, E75, X 95 compoziţia chimică(%)de API 5 dp: compoziţia chimică毕业生保罗E75 < 0.015 < 0.003 X95 < 0.015 < 0.003 G105 < 0.015 < 0.003 S135 < 0.015 < 0.003仪器缩写< 0.015 < 0.003 Proprietatile mecanice啤酒API 5 dp:Ţeava corpului clasa randament puterea tracţiune alungirea duritate dimensiunea夏比impactul testul完整(J)最小最大最小最小ψMPaψMPa Psi MPa HBW HRC medie singur E75 75000 517 105000 724 100000 689 625000 a0.2 / U0.9 - - 80 65 X95 95000 655 125000 862 105000 724——80 65 G105 105000 724[…]