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开关属于用点设备吗
船用低压开关设备和控制设备出厂检验细则
thrift of excellent traditional and style lack dee p of understa ndi ng, one-side d thi nk in now of good sit uation Xia, economi c smooth more fast devel opme nt, and reform made major pr ogress, a nd people livi ng significa ntly improve, a nd social the career made new pr ogress, no nece ssary always hard has, no awareness to Chi na also has many poverty area, a nd al so has many poverty popula