药皮 meaning in English

coating
sheathing

With the result the coating projects beyond the molten end of the electrode metal .
结果药皮伸延于焊条金属芯熔端之外。
Optimal basicity of 5ni - cr - mo steel electrode coating
钢配套焊条药皮碱度研究
Bare aluminum and aluminum alloy welding electrodes and rods , specification for
无药皮铝和铝合金焊条和焊棒规范
Ilmenite type electrode which property and description are as same as j502
钛铁矿型药皮焊条，性能及用途同j502 。
Double coated electrode
双层药皮焊条

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