单词	maintain valve
释义	maintain valve 检修阀
随便看	basic criterion basiccrop basic crop basic cropland protection basic crops basic crown gear basic crust Basic Crypto Analysis Course basic crystallography and mineralogy basic cube Basic cultural category basic cultural rights and interests basic culture medium basic culture medium MS basic cupola basic cupric carbonate basic cupric chloride basic cupric chromate Basic cupric sulfate basic cuprous sulphate basic currency basic current basic current switch circuit basic curriculum Basic Curriculum