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1·In this article, it shows formulas to calculate bending moment, shear strength and maximum stress of heat tracing pipe and shell body.

首先给出了半管加热管及壳体的弯距、剪力及最大应力计算公式。

2·The extra low electromagnetic wave, wavelet technology, pipe track instrument, DGPS and tracing signal equipment are used to solve the key question of trans-mit-receive and communication.

研究信息融合技术在海底管道维修装置与检测装置间的应用，采用超低频电磁波，小波分析等技术与管线跟踪探测仪、DGPS以及示踪信号探测器等设备解决发射、接收、通讯技术中的关键技术点。