K13Ϳ,ȫK13ֲwSͿ һֲwS۞ԭȫI(lng)ȼg(sh)ͿˇͿāӶ---Чһ---Aһ---Ϳ

a(chn)Ʒԣ
ðl(f)(zhun)g(sh)m҃⽨ȵı棺һסլС^·߅סլ·
eߙnסլƵW(xu)Уw^(l )d脡ԺS(chng)҃≦b˾иߙn
zЧpٺ;ЧOɫSƽԽͿˢ(jin)
Һ͕ϼMИOѵĸ(zh)(yu)ıɫԼϻ䷽
ṩùA⾀(xin)ݗTͿͿҪԭϞ{ӽYP(gun)h(hun)ˮͿϷӲϊAg(g)
gĤطֲ˾иЧͨ^(gu)p,Ķͬr(sh)
߀в{ײ{ײϱM(mn)ֱ 1umҵС,Сɱ,
ݷeռwe50%,˾õ,ҌĿоԭ֪
䵽Ϳr(sh)M(jn)϶Ȳ϶ȲĿ՚(dng)Ħ՚ճͿӃȲ
ğʹஔһDɟĶʹ˥pp_Ŀ(jin)
f(shu)ڲͬ|(zh)Ă^(gu)D.DĵĂfǿ(zh)՚
c֮gƄ(dng)_һlcԴʎֱӵP(gun)ϵ
lʳʬFҎ۵׃ʹ (tng)X(ju)ܵ(dng)܁yԴX(hu )ƣҺųM(jn)ʹ (tng)˸
혲 ؐDecibel DecibelBelʮ֮һ҂Belgɣؐؐ
Decibelgɷؐĉһr(sh)ȣԷؐʾ
6ؐ(sh)`C҃ȉ컨Ϳ˸ͿzЧdzܵȫÑ(h)
һºu Ϳzoһ(g)moCĽh(hun)
Ҏ20/ͰFͰ(li)ͣۼ{ײϼҺȹۻ
ϡጄˮ
ϡጱhˮϡ?zhun)^(gu)20%
ʩͿˢͿ݁Ϳ
ˢͿhˮϡ?zhun)^(gu)20%
݁Ϳhˮϡ?zhun)^(gu)20%
Ϳhˮϡ?zhun)^(gu)20%
Ϳˢe8ƽ/α飩Ĥȴ30ף
ȣ25ף
ָ|ɣ25棺<2Сr(sh)
(sh)24Сr(sh)
ɣ10-20
ɫɫSՈxɫ
ͲϴΔ3000
ʩضȣ5
ʩˇͿāӶ---ͿЧһ---Aһ---Ϳ
棺ꎛͨL(fng)̎ضȞ5-25ȷA˪
|(zh)˜ʣGB/T9756-2001Ҙ˜
ȫܣχҘ˜GB18582-2001҃bbϰȫ˜
|