The exploration and implementation of underwater vehicle's spiral motion create broader application scope for underwater vehicle, not only for long range voyage, but also for restricted region motion.
浮力驱动式航行器螺旋线运动模式的探索与实现，扩大了浮力驱动式水下航行器的应用范围，不仅可作远航程用途使用，而且可作定区域用途使用。
There are also problems in implementing time-period tariff such as narrow range of price difference, long demarcation of time period, lack of flexibility and limited scope of implementation.
但它也存在分时价差幅度小、时段划分长、缺乏灵活性及实施范围窄等问题。
There are also problems in implementing time-period tariff such as narrow range of price difference, long demarcation of time period, lack of flexibility and limited scope of implementation.
但它也存在分时价差幅度小、时段划分长、缺乏灵活性及实施范围窄等问题。
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