The paper analyzes influence of kerosene medium to performance of hydraulic component and hydraulic system,puts forward feasibility and attention problem of using kerosene medium in hydraulic system of aluminium strip and foil cold rolling mill,introduces design method of using kerosene medium hydraulic system.

In the industrial circulating water treatment,it is a new problem to treat leaking oil containing medium by using biological technique.

In industrial circulating water systems of the petrochemical enterprises,oil containing medium leaking often occurs,which can worsen the water quality.

We acquired two actinomyces from abandoned medium oil, mycoplana SP.

Using the self made liquid culture medium JOA, we isolate Mycoplana and Rothia from the wasted medium oil of a large size transformer.

In the research,medium oil,activator as well as UV-protector in addi tive of Metarhizium formulation were primarily selected.

The development and application of oil medium jack hydraulic pressure test equipment;

It is a kind of new technique to treat leaking oil medium in the industrial circulating water with biodegradation.

Four different kinds of selected oil coolants, with different thermodynamic physical performances, have been applied to small high speed diesel engines with other direct injection or precombustion chambers.