97. vacant a. 空的,未占用的98. vacuumn. 真空,真空吸尘器99. oral a. 口头的,口述的,口的
相关词条
+vacuum mug and vacuum
1 . 真空保温杯与真空
vacuum mug and vacuum brazing furnace ., 真空保温杯与真空钎焊炉.
+vacuum interrupter and vacuum
1 . 真空灭弧室和真空
China a vacuum interrupter and a vacuum switch the focus of equipment manufacturers , vacuum interrupter and vacuum circuit breakers for many years and sales of domestic home front .公司是我国真空灭弧室和真空开关设备的重点生产企业,真空灭弧室和真空断路器产销量连续多年居国内前列。
+vacuum technique and vacuum
1 . 真空技术和真空
practicality data of vacuum technique and vacuum heat treatment ., 真空技术和真空热处理实用数据.