In GB/T12706.3-2002, the single-core of a 35kV power cable is required to be shielded with a 0.12 mm thick copper tape, and G/A of the cable shielding structure of Annex G (Appendix C) of GB/T 12703.3-2002 is added: The metal shield G4.2 copper wire shield is composed of loosely wound soft copper w-----
At present, the distributed photovoltaic system grid-connected mode can be divided into three types of self-use self-utilization Internet access, full access to the Internet, and all self-use models. The former two modes are more common, and the user-side gri-----
If "e-commerce" sounded unfamiliar a few years ago, it is now almost every corner of people's lives. E-commerce is a new business model and synonymous with the trend of the Internet era. It is rapidly infiltrating and developing in all walks of life due to its ad-----
Mold has an extremely important role in modern industry, and its quality directly determines the quality of the product. Improve the life and accuracy of the mold. Shortening the manufacturing cycle of molds is a technical problem that many companies urgently need to solve. Mold has an extremely -----
In the process of making rapid molds and hand-shaped molds, there is often a procedure for polishing. The quality of the polishing directly affects the appearance of the final mold. This requires attention to those points when polishing the mold with sandpaper. In the process of making rapid molds-----
The gas-fired double furnace is especially suitable for the family and catering industry with small kitchen area. It can provide you with the function of induction cooker and provide you with the function of gas stove. It can also save you a certain space and greatly improve the environment. The e-----
Buying and decorating materials is a major task for home improvement. Some owners think that buying in advance will save time, or setting up materials for business promotion. In fact, many decoration materials must be matched with the home improvement process, or they must be constructed to a cert-----