无限维离散系统系统
Infinite dimensional discrete time systems
磁层-电离层系统(MI系统)
Magmetosphere-Ionosphere(MI) system
SnAgCu系无铅焊锡粉末
lead-free solder powder of SnAgCu system
lead-free solder powder of Sn-Ag-Cu system
free-lead solder power of Sn-Ag-Cu system
电力系统无功补偿及应用
non-work compensation in power systems & applicati
电力系统无功优化
reactive power optimization
给水系统无铜化
no copper in boiler feed water system
no copper in feedwater system
红外系统无热化
athermalization of infrared systems
交流系统无功能力
reactive power ability of AC system
无铅无镉
lead free and cadmium free
Leadless and Cadmiumless
Non-lead and Non-cadmium
Pb- and Cd-free
lead- and cadmium- free
Lead-free and Cadmium-free
Lead and cadmium free
无铅无镉化学镀镍
lead and cadmium free electroless nickel plating