阀门分类及技术术语英汉互译
2016年12月5日 ... 5】水封闸阀 Water Seal Gate Valves. 6】电动 ..... 非标准紧固件 off-rating fastening piece .... SPIRAL WOUND GRAPHITE 缠绕垫 .... materials 材料.
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dghwvalve's website is dghwvalve.com