单项选择题
A.2~4kWB.5kWC.10kWD.14kW
A.14kWB.20kWC.16~30kWD.30kW
A.25kWB.20kWC.50kWD.30kW
A.(6~9)m∕minB.10m3∕minC.40~120mmD.(6~7)m3∕min
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