| 摘要 |
Metal grid can be coated in many ways with plastic insulation mixture of high abrasive solidity provided that the grid was previously cleaned from all impurity, grease and dried and only thereupon it can be plunged into the solution of insulating mixture, is kept for a while for removing the bubbles, then taken from the solution, drained off and the surplus of the insulating mixture is removed, it is baked in the chamber at the temperature from 160 to 180 0C for about 30 to 70 minutes. When the required thickness of the layer is 5 mm, the each procedure should be repeated twice.
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