A.-5℃~+55℃ B.5℃~+55℃ C.15℃~+35℃ D.15℃~+30℃
A.網(wǎng)絡規(guī)劃 B.設備安裝 C.工程勘察 D.設備驗收
A.0.5Ω B.1Ω C.5Ω D.10Ω