沟底宽度随光缆数目而变,一般为1~2条光缆,沟底宽度和上宽分别为( )。
2023-05-11
A.200mm,400mm
B.300mm,500mm
C.300mm,600mm
D.400mm,800mm
参考答案:C
B.300mm,500mm
C.300mm,600mm
D.400mm,800mm
参考答案:C
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2023-05-11
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