求翻译：目前在国内尚无相关产品投入使用，而国外产品的价格又相当昂贵。因此，开展城市主排水管道拖缆机器人相关方面的研究具有重要意义。是什么意思？

Currently no related products in the country and put into use, while the price of foreign products are quite expensive. Therefore, carrying out the towline robot research of the city's main drainage channels of great significance.

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At present in domestic still not was connected the product operational, but the overseas product price was quite expensive.Therefore, develops the city host drainage channel towing bridle robot correlation aspect the research to have the vital significance.

There is no related products currently in the country put into use, and the prices of foreign products is very expensive. Therefore, hauling of city main drainage pipeline robot-related research is of great significance.

正在翻译，请等待...