Sodium ethylate was used as catalyst in Baker - Venkataraman of cyclization, and all factors were studied.环合反应采用乙醇钠作为Baker-Venkataraman重排反应的催化剂, 研究了影响反应的各个因素....
She sells handicrafts to the tourists.她向游客出售手工艺品。This village has its own traditional dress, cuisine, folklore and handicrafts.这个村子有自己传统的服饰 、 烹调 、 民俗和手工艺.These artistic handicrafts are very popular with foreign friends.外...
您还可以更改Y轴上的单位。You can also change the units on the Y-axis.用散光的方法来提取光源在Z轴上的位置。Using astigmatic method to extract information of light source in z axis.这种流量计有两个称杯,它们是连接在一起并装在中心轴上的.This meter has two buckets fastered togethe...
Marketing of processing machines for lathing, planning, milling, grinding and drilling metals.经销车, 刨, 铣, 磨,钻等金属切加工设备.The most common finishing operations are mechanical, such as milling, grinding, or polishing with abras...