length of normal是什么意思

用法例句

Study on production line of switch sleeper with long line method;

长线法岔枕生产线的研究

To introduce the fold line pre-tension technology in practical projects, authors state some study works of the long line method of fold line pre-tension beams such as design of uplift piles, tension bases and transfers and tests of frictional resistance of transfers and so forth.

为在具体施工中推广折线先张法技术,介绍了折线先张梁长线法中抗拔桩的设计、张拉台座的设计、转向装置的设计、转向装置摩阻力的试验等研究工作。