A type system of buried underearth oil tank
   Oil tank is directly buried uder the ground with the explosion-proof submerged pump, which can guarantee not to be affected by the absorbing vacuum degree and to continuously supply oil.

B type system of buried underearth oil tank
   Oil tank is directly buried under the ground with explosion-proof gear pump to guarantee the high exhaust pressure head and reliable operation.

C type system of overground oil tank
   Oil tank is placed on the ground for easy management and high delivery static pressure. But oil is filled in the oil tank
by oil-can raising the static pressure with gear pump when the oil tank is fed.

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