Mitsubishi Oil Co., Ltd.

Koji Tsuchimoto

Hajime Yoshida

Junsuke Yabumoto

Hisashi Yano

Kazuhito Tate

Kazuhiro Yanagida

Masayoshi Muraki

Mitulu Fujioka

A device for dynamically measuring the bubble content of a flowing liquid is arranged in a conveyance passage for a flowing liquid or provided in a simple bypass for the conveyance passage of the liquid so that the bubble content of the flowing liquid and the bubble quantity of dissolved gas in the flowing liquid can be dynamically measured due to a change in the pressure of the liquid in the passage or the bypass without extracting any of the liquid therefrom.

Device for dynamically measuring bubble content of flowing liquid

A lubricating oil is disclosed, which mainly is composed of a naphthenic hydrocarbon having 19 carbon atoms comprising two cyclohexane rings which have methyl-substitution at the 1, 2 and 4 positions thereof, the two cyclohexane rings being linked by a methylene group.

Lubricating oil for traction drives

A process for producing a graphite fiber is disclosed, which is characterized by using, as a starting material, an optically anisotropic pitch prepared from a compound having a specific chemical structure as represented by formula (I) shown in the specification. The resulting graphite fiber shows a highly developed graphite structure and has excellent electrical conductivity.

Process for producing conductive graphite fiber

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Chiba, Japan

Koji Tsuchimoto