“workover derrick”的概念、定义、翻译、参考文献-科学参考

单词	workover derrick
释义	workover derrick Encyclopedia 工学修井井架释 workover derrick修井井架用于安放天车、游车等吊升系统设备和工具，并用以起下和存放钻具的钢架结构。
随便看	piston ring seal piston rod piston-rod piston rod packing piston seals piston stroke piston stroke-bore ratio piston type formation pistosaurs P.I.Stuchka pi-system pit pitahaya pit and adit engineering pit and fissure sealant pitaya pitaya stem rot pit bottom Pitcairn Islands pit canal pit cavity pit cell pitch pitch accent pitch and curvature of roof

科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。