本发明公开了一种压差式自动关闭阀，该阀包括阀体、通端盖、阀芯球、弹簧座、弹簧、进口端、出口端；
The invention discloses a different-pressure automatic shuttle valve, comprising valve body, through end cover, valve core ball, spring seat, spring, inlet end, outlet port .
包芯线喂线处理生产球墨铸铁是一种新的球铁生产工艺。
Cored wire injection is a new technology for the production of ductile iron.
为了制备高温气冷反应堆用燃料芯核，致密uo_2微球，研究了一种新的溶胶-凝胶工艺。
A new kind of sol - gel process for preparation of dense UO2 kernels used for HTGR (High Temperature Gas cooled Reactor) has been developed in our institute.
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