A.99.99% B.99.98% C.99.95% D.99.9%
A.1次/3個(gè)月 B.1次/2個(gè)月 C.1次/1個(gè)月 D.2次/1個(gè)月
A.-22dBm左右 B.-20dBm左右 C.-25dBm左右 D.-30dBm左右