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caidao737:TRD是什么意思? (2017-08-14 06:52) zT>!xGTu7~
r90048song:光斑直徑7mm (2017-08-14 17:07) qA[lL(
caidao737:您的传播距离上20米以内?光源尺度为12-14mm? (2017-08-22 15:10) $^Xxn.B9
r90048song:是的,光源發散角53度 (2017-08-23 09:25) q2 7Ac;y
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