For laying indoors , intunnel or cable trench, unable to bear external mechan-icalforces. Single-core cable in magnetic duct is not permissible.
室内、隧道及电缆沟等场所，不能承受机械外力。单芯电缆不允许敷设在磁性管道中。
Mechan-ics model, basic formulas , basic measures and an example to use the method are given, which is significative in theory and applicable in engineering.
提出了该方法的力学模型、基本公式、基本方法和算例。具有理论意义和工程应用价值。
The author deals mainly with the principle of the mechan- amplifier and the design, selection and method of use of digital circuit and photo-resistance circuit.
这里主要介绍机械放大原理、光敏电路、数字电路的设计、选择和使用方法。
应用推荐