利达华信壁挂式JB-QB-LD988ENM火灾报警控制器消防联动主机 价格 ￥1900.00 起订量 1台起批 货源所属商家已经过真实性核验2人想买 发货地 广东 深圳 火灾报警控制器消防联动主机 JB-QB-LD988ENM 1900.00元 所属类目 安全防护;消防设备;消防报警设备 产品标签...
The main reason that has caused the active study of spatial database management systems (SDBMS) comes from the needs of the existing applications such as geographical information systems (GIS), computer-aided design (CAD), very large scale integration design (VLSI), multimedia information systems ...