激光指向仪 laser orientation instrument
激光指向 [矿业] laser alignment
竖井激光指向 [测] [激光] laser guide of vertical shaft
光指向标 optical beacon
激光指向仪给向 driving direction guided by laser
闪光指向信号 flashing direction signal
指向面光源 Target Area Light
目标指向点光源 Target Point Light
光斑指向稳定性 Beam pointing stability
简易激光指向器 simple laser direction indicator
因此大部分的光伏阵列使用固定支架指向南面(或北面如果你位于赤道以南)。
So most PV arrays use fixed mounts that face south (or north if you are below the equator).
新加坡樟宜机场的海关官员用手指向了我女朋友那正在从X光机里缓缓移出的行李箱。
The customs officer at Changi Airport in Singapore gestured at my girlfriend's suitcase as it rolled out from the X-ray machine.
有的光伏阵列使用跟踪系统让太阳电池板一直指向太阳。但是这些系统价格昂贵还需要维护。
Some PV arrays use tracking systems to keep the panels pointing at the Sun, but these are expensive and need maintenance.
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