The main copper minerals are malachite, chrysocolla, little chalcopyrite, chalcosine and even little bornite and covellite. 矿石主要含铜矿物为孔雀石 、 硅孔雀石, 少量的黄铜矿 、 辉铜矿及极少量的斑铜矿和铜蓝等.
a cryogenic storage system低温冷藏系统Trapping gas pump include: adsorption, such as pumps and cryogenic pumps.气体捕集泵包括: 吸附泵和低温泵等.Foamed plastic materials containing many small cells which are not connected are good cryogenic i...
There was a trace of exasperation in his voice.他的声音听上去有些愤怒。Mahoney clenched his fist in exasperation.马奥尼恼怒地攥紧拳头。He snorted with exasperation.他愤怒地哼了一声....