其外层环带还有沟通树冠和树根的运输线.The outer zones are the conducting routes between the crown and the roots.两套夹瓶环带结构, 使高瓶或站立不稳的瓶子也适应.Two sets of bottle nipping and annular belt structure. Good effect for some bottles erecting unsteadil...
简介氟树脂的种类和聚四氟乙烯的发现经过.Sorts of fluororesins and the discovery of polytetrafluoroethylene are introduced.液晶容器的内表面上可以包括一含氟树脂.An inside surface of the liquid crystal container may include a fluorine resin.聚全氟乙丙烯是一种重要新型氟树脂产品,本...