“perforation hole”的概念、定义、翻译、参考文献-科学参考

单词	perforation hole
释义	perforation hole Encyclopedia 工学射孔完井释 perforation hole炮眼在射孔完井过程中，由射孔弹燃爆后形成的穿透套管、水泥环直到地层一定深度处的孔眼。
随便看	primary endosperm cell primary endosperm nucleus primary energy primary environment primary environment; original environment primary etching primary explosive primary extension primary extraction primary factor primary feed primaryfermentation primary field primary [fission] fragment primary fission fragment primary fission product primary fissure primary flaw primary focal point primary follicle primary fossil primary fragment primary frequency standard primary gas thermometry primary glass making

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。