About OGURA SHOHEI
About vacuum pump
About surface analysis
About analytical instrument
About adsorption
About mean free path
About compression ratio
About velocity
About rotary pump
About molecular pump
About ion pump(vacuum)
About cryopump
About vacuum gage
About turbo molecular pump
About pumping speed
About Vacuum production and techniques
About Vacuum pumps
About 器具
About 使用法
About 真空ポンプ