1·The top of each earth electrode shall be protected from damage by placing it in a lightweight inspection chamber similar to Furse Catalogue No. PT205.
每个接地电极的顶部应得到保护，免受损坏，放置在一个轻量级的检查室，类似弗斯目录号PT205。
2·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。
3·The investigation of effects of rare-earth yttrium and boron, which are in the 3.5% nickel-containing steel welding electrode on low temperature toughness has been carried out.
对含镍3．5％低温钢手工电焊条配方中稀土钇与硼的作用进行了试验研究。