这些不稳定的接头一旦偏离正常的直线位置就很难校正。
These unstable joints are very difficult to correct once they deviate from the normal, straight position.
可提供多种阀体类型供选择，包括，角型，直线型，左侧拐角型，右侧拐角型，直立型和直立双接头型。
Available in a choice of various body patterns including Angle, straightway, left hand corner, right hand corner, vertical and vertical double union.
提出了正常间距单渡线实施过程中需要采取的具体措施，包括其夹直线处短轨及其绝缘接头的处理问题。
The problem is, as the author argues, how to take the detailed measures in engineering process, including the technique to deal with the short rail and the insulated …
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