可能可以使用特殊的金属丝刷来清理管道端口，但是使用时要小心，避免过量的金属无法从管道中清除出来。
Special wire brushes designed to clean tube ends may be used, but they should be carefully used so that an excessive amount of metal will not be removed from the tube.
所得少量浓缩液去掉铁等杂质之后，加过量氨使钴形成络合物，再用锌粉置换出金属钴粉。
Cobalt can be converted into complex ion by excess ammonia and then recovered as highly pure metal cobalt powder by replacing with zinc powder.
分析结果表明，铸锭中分布不均匀的非金属夹杂物和组织中过量分布于晶界的贝氏体和三次渗碳体是导致冷镦开裂的原因。
It was revealed that: inhomogeneous distribution of the non-metallic inclusion and excessive bainite and tertiary cementite is the cause of cracking.
应用推荐