Txhua hom thiab cov chav kawm ntawm peb cov neeg tua hluav taws xob thiab hluav taws xob 20KA ~ 200KA (8/20μS) thiab 15KA ~ 50KA (10/350μS) raug sim thiab dhau tag nrho cov kev xav tau raws li lawv cov chav kawm.