“tax exemption system”的概念、定义、翻译、参考文献-科学参考

单词	tax exemption system
释义	tax exemption system 免税制度
随便看	valve-switching mechanism valve system valve tappet valve tappet adjustment valve tappet bridge valve-tappet clearance valve-tappet clearance adjuster valve tappet cluster valve tappet guide valve-tappet plunger valve tappet roller pin valve-tappet tube valve-tappet wrench valve tee valve tension spring valve test valve tester valve the gas valve thimble valve throat valve timing valve timing adjustment valve timing angle valve timing event valve timing gear

科学参考收录了1248194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。