“油管头”的概念、定义、翻译、参考文献-科学参考

单词	油管头
释义	油管头 Encyclopedia 工学井口装置释 tubing head油管头油井生产管柱最上层装置。用于悬挂油管及密封油管与套管之间环形空间，上部接采油树配合生产。
随便看	forage growth regulation forage harvest season forage heat resistance forage irrigation experiment forage legumes forage milling machinery forage-orchard system forage palatability forage particles forage pellets forage phenological phase forage planting density forage planting pattern Forage Plants forage powder forage preservative forage production forage production machinery and equipment forage products forage propagation forage quality classification forage quality prediction forage rapeseed forage regrowth forage reproduction

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。