仪表空气管线应该使用316不锈钢管。管线应为无缝管并且易于弯曲。接头应适用于所选的管线。
Instrument air tubing shall be 316 stainless steel. The tubing shall be seamless and suitable for bending. The fittings shall be suitable for the selected tubing.
研究了跨区间无缝线路的两项关键技术，即钢轨绝缘接头的处理和可动心轨无缝道岔的应用。
Two kinds of key technology for interregional LWR, disposal of glued insulated joint and application of swing nose frog turnout, are researched in this paper.
钢轨焊接是无缝线路建设工程中的关键环节，它直接决定了钢轨接头的质量，从而对铁路安全有重要影响。
The rail welding plays an important role in the engineering of laying continuous welded railway (c WR), and decides the quality of rail tie-in directly, which has great influence on railway security.
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