“after-sales and maintenance services”的概念、定义、翻译、参考文献-科学参考

单词	after-sales and maintenance services
释义	after-sales and maintenance services Encyclopedia 理学生产性服务释 after-sales and maintenance services售后与维修服务在商品出售以后所提供的各种服务活动和维修活动。
随便看	reliable computation reliable computing reliable digit reliable estimation reliable knowledge reliable text reliable weight formula reliable weight of sample relic center relic coastline relic distribution relic magnetic field relic of supernova relics relics of ancient smelter in China relics of the Big Bang relic species relict relict basin relict landform relict plant relict sediment relict species Relief relief

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。