The programmer forms the heart of the process chromatograph.程序控制器是色谱仪的关键部件.The basic principle of vacuum braze and its application in manufacturing gas chromatograph are described.介绍了真空钎焊技术的基本原理及其在气相色谱仪气路部件加工中的应用.The tec...
I had to wear long sleeves to stop myself scratching.我只好穿上长袖衣服以免自己挠痒。The sleeves covered his hands to the tips of his fingers.袖子遮住了他的手，一直盖到指尖。His sleeves were rolled up to his elbows.他的袖子卷到了肘部。...