standby equipment短语¹⁴⁴⁹⁷²⁺² 基本例句 备用设备 The essay analyzes the existing problems in traction power supply plan of Xuzhou railway power supply conjunction, such as: the arrangement of main and standby equipment in conjunction substation; 本文分析了徐州枢纽电力牵引供电方案所存在的一些问题，如：枢纽变电所的主备用设置； dictall