00307nam a22001337a 4500003000700000005001700007008004100024082001600065100002000081245003100101260002800132300000800160650000500168MPLRDC20220104142647.0210129b           ||||| |||| 00| 0 eng d  a337.01 WYJ   a汪源浚编著  a综合电子技术问答c  ab科学出版社c1986  b平  a