Keep down or you'll be hit by shell fragments.趴下,否则你会被弹片击中的.They hoe the garden to keep down the weeds.他们把花园里的草锄掉,阻止其生长.She is managing to keep down her spending.她在设法缩小开支....
经过科学严格的工艺灌封, 保证了其稳定性, 可靠性高.After rigorous scientific process potting, and ensure its stability, high reliability.介绍了电力电容器用浸渍灌封蜡的研制过程.The development of potting and dipping wax for power capacitor are described.与灌封设备连结组成管...