Meantime, absorption value of iodine, benzene and formaldehyde on bamboo charcoal and its volume electric resistance rate was determined.
测定竹炭对碘、苯、甲醛等的吸附性能及竹炭体积电阻率，发现所用竹炭性能较好。
The contact electric resistance of the power supply electrode is in direct proportion to earth electric resistance rate, and in relation to the diameter of the electrode and the depth of the earth.
供电电极的接触电阻与大地的电阻率成正比，与电极的粗细及入土深度有关。
The contact electric resistance of the power supply electrode is in direct proportion to earth electric resistance rate, and in relation to the diameter of the electrode and the depth of the earth.
供电电极的接触电阻与大地的电阻率成正比，与电极的粗细及入土深度有关。
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