screw extruding briquetting
... 对辊成型 roller press briquetting 螺旋挤压成型 screw extruding briquetting 型煤固结 briquette indurine ...
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螺旋焊管是以带钢卷板为原材料，经常温挤压成型，以自动双丝双面埋弧焊工艺焊接而成的螺旋缝钢管。
Spiral welded pipe is a strip coil as raw material, often warm extrusion molding, to automatically double-wire submerged arc welding process double-sided spiral welded pipe joints.
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