Based on the principle of volume contraction of freezing, the designing process of riser fitting to the cast steel inserteddie with exothermic covering flux has been studied.
根据体收缩原则,研究了适用于模具镶块铸钢件加发热覆盖剂保温的冒口设计工艺。
2
The forging die of adjustable pliers has been analysed and improved from integral die to inserted type die which is convenient in striking and assembling and its pack-age is easy to be changed.