It is a best method selected possibly nowadays for recovery of function of an old gas pipeline to insert a thin-walled polyethylene lining into a steel pipeline by the way of non-excavation.
用非开挖方式向钢管道内穿插薄壁聚乙烯内衬是目前可选择的恢复旧燃气管道使用功能的最好方法。
After molding, there is gas trap on the part surface, suggest adding insert.
成形后，产品表面有困气，建议增加镶件。
The impact of repetition on Gas Chromatogram was studied with glass wool in glass injector insert and different concentration samples.
本文研究气相色谱进样系统中，玻璃衬管中有、无 玻璃棉填充以及样品浓度的高低对仪器的重现性的影响。
The impact of repetition on Gas Chromatogram was studied with glass wool in glass injector insert and different concentration samples.
本文研究气相色谱进样系统中，玻璃衬管中有、无 玻璃棉填充以及样品浓度的高低对仪器的重现性的影响。
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