1·The structure, operating principle and action of mechanism of automatic sprue cutting by ejector pin in thermosetting plastics injection mould was described.
介绍了推杆自动切断浇口机构在热固性塑料注射模中的具体结构、 模具工作过程。
1·Silver: Before the dawn of antibiotics, silver was used on the skin as an antimicrobial agent and disinfectant and internally to treat epilepsy, gonorrhea and tropical sprue.
银：抗生素问世之前，银被外用为抗菌剂和消毒剂，人们还拿来内服，用于治疗癫痫、淋病和热带口炎性腹泻。