This paper starts with the oil transmission system in the high oil buring equipment,which nowadys has increasingly wide use in air conditioning system in civil buildings,analyses the technicla problems which often present in the design and construction of light oil transmission system, then proposes the methods which can solve these problems.

The work principle,failure phenomenon,and the characteristics of the oil transmission system of the wing fuel tank of a certain series aircraft were described.

To evaluate crude oil transporting efficiency through fault at the fold-thrust belt in sou-thern margin of Junggar Basin,an evaluating method on crude oil transporting efficiency through fault is established by defining fault transporting coefficient and analyzing effectiveness of crude oil accumulating process.

A set of formulae for calculating the equivalent permittivity ε_(eff) and equivalent permeability μ_(eff) of multilayer absorbing material based on reflection coefficient and transmission coefficient was presented.

The existing reflection and transmission coefficients of a frequency selective surface(FSS) do not apply to calculation of reflection and transmission under normal incidence of waves,and need to be modified.

This paper discusses the basic theory and analytical steps of using indirect ray method to calculate power transmission coefficient, boresight error and boresight error slope of large dimension radome.