单项选择题
A.8AMPB.10AMPC.15AMPD.20AMP
A.12VDCB.24VDCC.110VACD.220VAC
A.12VDCB.12VACC.24VDCD.24VAC
A.2000psiB.2100psiC.3150psiD.4500psi
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