挤压机筒体如何升温?
参考答案:
筒体的升温必须与模头的升温同步进行;以每50℃为一段,待两边平衡后再升50℃,直到升至250℃,达到最终温度后,至少应保持恒温2小时。
In relation to the basic legal system of China:
(b) state any one of the rules regarding the validity of a contract provided for in the judicial interpretations on the Contract Law by the Supreme People’s Court. (4 marks)
丽春红S(Ponceau染色液)染色胶原纤维显示()
A.绿色
B.红色
C.黄色
D.蓝色
E.黑色