The development of key technology of cotton transplanting. Cotton seedling transplanting machine is mainly used for mechanized cultivation of cotton seedlings after industrialization in Central Plains cotton area. The main technical performance indexes are as follows: tractor, hanging aluminum alloy gravity casting type, small four-wheel tractor, two rows of hanging type (medium power tractor, six rows of eight rows), single independent type (overlying soil drive); Space: 550-750; Arbitrary adjustment; Plant spacing: 150, 200, 250, 300, 350, 400; Coefficient of variation of plant spacing (%) : >25; Seedling leakage rate (%) : 4; Seedling reversal rate (%) : 30C) : 8; Application: 1 plant/mu; Fertilization: 1 plant/mu; Transplant: 60, 80, 100, 120 and 140. The main products of Casting Co., Ltd. are 35kV - 500kV sulfur hexaflooride circuit breaker porcelain sleeve, transformer porcelain sleeve, vacuum circuit breaker porcelain sleeve, zinc oxide lightning arrester porcelain sleeve. The main production equipment has the domestic equipment technology level of the same industry, effectively meet the product processing quality and dimensional accuracy requirements. The company has a sound quality management system, scientific research and testing means complete, can effectively ensure the stability and reliability of product quality. Ultra-high pressure large porcelain bushing is: the forming process of ultra-high pressure large porcelain bushing and the cracking, bending and other technical problems in the firing process are the important problems restricting the development of our factory in the next few years. Ultra-high pressure large porcelain sleeve technology content, copper casting is high, the production is difficult, high stain resistance grade, can make the technical content of the factory to raise a level. If the research and development is successful, with the price of raw and auxiliary materials rising, our factory can increase production of 6 million yuan every year, to create a profit of 1.6 million yuan, and enhance the competitiveness of the enterprise.