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张前 《石油工业技术监督》2021,(6):8-11
为了规范高压管汇管理,提高高压管汇现场使用的安全可靠性,克服传统手工记录统计信息的不足之处,有效实时监控高压管汇的状况,设计开发了一套基于RFID的高压管汇生命周期管理系统.系统所使用的电子标签为铝合金外壳加陶瓷封装的无源抗金属电子标签,网络连接采取VPN通道模式以实现内外网同时作业.在高压管汇的库房管理、上井使用、检... 相似文献
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Berry Chen 《中国对外贸易(英文版)》2009,(4):34-35
After the ups and downs of Chinese steel pipe market in 2008, industry structure changes are taking place quietly. Some enterprises with high-end oil and natural gas pipes and high-pressure boiler tubes have not been much offected in this storm, and won good market demand, while others with low-end products have been eliminated. It is expected that national output of weld pipe will approximately reach 23 million tons in 2008, a decrease of 2.5% compared with 2007 and seamless pipe will approximately reach 20 million tons in 2008, an increase of 7.4% compared with 2007. 相似文献
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