gb/t 19520.16-2015 gb-gbt.com 国标行标英文版。gb, gb/t, gbt, yy;yy/t;hj;hj/t;jb;jb/t;nb;nb/t;dl;hg;qc;qb;sl;sn;sh;tb;jj;jjg;cj;tb;yd;ny;fz;jg;dl;yb;ys;sj;sy;gy;yc;ls;aq Category:consumer electronics Global Rank:2,053,644 visits:22.6K pages/Per:1.1 ADS