web covers中文什么意思

例句与用法

1. Through the new system , the search engine can implement larger scale web covering and faster index updating , and provides better searching service
   通过这个新的系统，搜索引擎能够实现更大规模的网页覆盖和更快的索引更新，从而提高更好的搜索服务。
2. This series for air conditioner is used for assistant heating in air conditioner . the heater is mainly composed by heating pipe , firm housing , temperature controlling tube , heat fuse and protecting web cover and other components . the heater is made trough advanced technology by adopting high quality stainless steel as the case , high resistor ni - cr alloy wire as the heating material and electrical melting mgo powder as the insulation medium . its electric performance index is much higher than the industry standard and the quality is leading an advanced position in the industry domestically
   热熔断器及防护网罩等零部件组成。电热管采用优质不锈钢作外壳。用高电阻镍铬合金丝为发热材料，以电熔氧化镁粉作绝缘介质，经过先进的生产工艺制作而成，其电气性能指标远高于行业标准，产品品质领先于国内同行业水平。