]ʽsL(fng)cP(gun)ϵ
ߣhengke(li)Դӱ(li)h(hun)Ƽ˾r(sh)g
2021-07-20 08:41 L(wn)
]ʽsL(fng)ȵ~Ƭό(du)Ҳһ̶ȵӰ磬TX~ƬСڛ_䓰 ~ƬȽ~ƬСһϵēpϵ(sh)ԽԽ
]ʽsL(fng)cЧӰ
]ʽsL(fng)~ƬΠҲ(du)L(fng)ЧкܴӰL(fng)~ƬΠֱӰ~Ƭuď(qing)ȣĶӰL(fng)ȵЧˣ~ƬΠM(jn)иõΠͺmďǶȌHڜpٜuҿԴL(fng)Чʡ
y(c)ԇL(fng)ȵ~Ƭό(du)Ҳһ̶ȵӰ磬TX~ƬСڛ_䓰 ~ƬȽ~ƬСһϵēpϵ(sh)ԽԽ
ں㶨D(zhun)ٵrL(fng)~ƬĔ(sh)L(fng)ȵL(fng)ګ@ͬL(fng)ǰԽL(fng)D(zhun)ĶL(fng)Ȼ(dng)~ƬĔ(sh)6r(sh)~ƬĔ(sh)L(fng)ͨ(du)Ԯa(chn)ؓ(f)Ӱ
ٌ~ƬL(fng)Ⱥխ~ƬL(fng)ȵcǰͬ ǰߵˮƽȺߵ4dBAĽ27pСL(fng)Ⱥ͓L(fng)֮gg϶ԷֹɜpL(fng)y(c)ԇ(dng)g϶r(sh)L(fng)27½3dBA D(zhun)ٿʹL(fng)֏(f)ԭʼˮƽԽ2dBA
]sL(fng)Ўŷŵ L(fng)ȵL(fng)㣬ɱ،(do)sЧʲĆ(wn)}(du)sӋ(j)MeȻ2.7. 3600õL(fng)Ȼُ(gu)I(mi)һ(g)L(fng)Ӌ(j)ڳL(fng)̎(du)M(jn)Мy(c)Բ鿴sL(fng)ǷL(zhng)3ף3sҪs3×3×2L(fng)7×3600=87480/Сr(sh)
һ(g)(wn)}Ҫע (dng)L(fng)Ӌ(j)y(c)L(fng)̎L(fng)ٕr(sh)L(fng)Ͳڸ(hu)дL(fng)݆ݞto(w)L(fng)(du)SL(fng)ȁ(li)f(shu)@@r(sh)бҪy(c)݆ݞױڵĎׂ(g)c(din)ȻM(jn)зeӋ(j)՚Ա(zhn)_
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ڱo(h)(dng)S͑״ʹ÷]ʽs(do)pĶһpʧ 죬҂c]ʽs屣o(h)
pٱ۹坍hʹúd̫(yng)Ѩˢòĥϵ坍pp坍ø߉ˮܛÜˮ_ϴøëȻ坍^(q)Ϳσ(yu)|(zh)Ϟӱo(h)
坍-ָy֬؏(f)E1-2.Ȼʹ̼?x)仯坍ͪƾʹκ̼(x)仯坍a(chn)Ʒr(sh)СֹڪMСgʹáՈ(qng)ֺƤw¶܄Ҳʹüò坍ͱP(pn)䓽z坍ˢM(jn)坍坍øëɲ坍^(q)Ϳσ(yu)|(zh)Ϟ(qing)o(h)
ճSo(h)-غ坍(jin)εĉ坍Hmڽٰ壩ʹͨ坍ÿһʹ坍ˮںI(y)h(hun)иl@ЩھSo(h)P@坍坍 ՚Ⱦ
ʹȥ(yn)صPgFȾc(din)c(din)׃ɫͺ䣺ȇLԇE1-3.](mi)ȥnFP
һ(yng)ԓֶ摪(yng)ԓßˮϴܛ͵IJҺ10-15ҺͿTiexiuһ(hu)Ո(qng)á@N(hu)gFw
Ȼðˮ_ϴȻٴßˮ_ϴͿһӃ(yu)|(zh)Ϟ(qing)o(h)áʹr(sh)ҪdzСʹúϳzhʹo(h)ĿR͇ȹO(sh)\䓳ɷՈ(qng)Ҫʹô˷͘(bio)(zhn)ھSo(h)坍P䓆Ԫr(sh)(yng)ָʾָ坍P䓕r(sh)Ո(qng)ʹôֲڵɰȥ۽z Ո(qng)ʹßo(w)C(j)M(jn)坍 ҪP䓽|F̼
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