A.6000 B.15000 C.12000
A.0.6~0.75 B.0.7~0.9 C.0.9~1.0
A.發(fā)光強度變強 B.發(fā)光強度變?nèi)?、照射方向變?br /> C.照射方向左右偏移小于標準值