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l(f)r(sh)g2021-03-11 鿴Δ(sh)
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Hʽˮ̎O(sh)
ˮ̎O(sh)Ĥ--ﷴ(yng)ҪĤxMﷴ(yng)ɲֽMɡͨᵽĤ--ﷴ(yng)(sh)H(yng)ĿQ
UˮҪʳÏUˮסޏUˮkUˮʳÏUˮкдĄ(dng)ֲͣ(yng)O(sh)ÆΪ(d)ͳ̎(jng)ͳA(y)̎ʳÏUˮRͬkUˮסޏUˮٽ(jng)S̎oͨ^(gu)ˮܾW(wng)M(jn)ˮ̎S̎(xing)Ŀ܇o(w)ˮ̎SܾW(wng)O(sh)ȫ(xing)Ŀˮܽˮ̎S̎t(j)(xing)ĿˮKܼ{ˮwıo(h)ȼ(j)x(yng)ˮ̎ʽ̎
ˮ̎O(sh)L(fng)C(j)ЙC(j)еO(sh)伯вһ(g)Ԫ(ni)\(yn)й늚O(sh)䲼ڸO(sh)g(ni)ԓԪP(gun)Ҏ(gu)O(sh)Ӌ(j)ͨL(fng)O(sh)ʩO(sh)бֱͨѲҕzͨtݵĽǶȲ^(gu)45O(sh)䲼Ñ(yng)]\(yn)SˆTIJlO(sh)O(sh)Ĺb\(yn)Сzõ˿ݡͨ
ϵy(tng)(ni)D(zhun)(dng)C(j)еO(sh)䣨ˮL(fng)C(j)ȣõ\(yn)ˮáL(fng)C(j)(dng)ָ(bio)MtO(sh)(yng)ķpʩL(fng)C(j)ڲpӸ\(yn)ھL(fng)C(j)1.5m80dB
L(fng)C(j)gãУ2_(ti)11
̎ϵy(tng)(ni)xY(ji)ĤÓĤp|(zh)ߏ(qing)ȡg϶ʸߵďϡ
ʽˮ̎O(sh)
͏UˮҪ(li)Դʯ͡ʯͻFúl(f)վC(j)еӹȹI(y)T(mn)UˮȾ|(zh)ؽ͵(du)ܶȞ1.1(du)ܶȶС1|(zh)ڏUˮͨNB(ti)(1)͵100mڏďUˮзx(li)(2)ɢ.͵10һ100m֮gˮС(3)黯͵С10mďUˮзx(li)
1)^(gu)VЧ:Ͻ^(gu)VM(jn)ˮеĴw͑Ҹ;
2)ˮЧ:܉?q)ӵIJԵ|(zh)ˮD(zhun)СӵĿԵ|(zh);
3)Ч:ˮеЙC(j)ȾһڱL(zhng)һӚķʽ(jng)^(gu)Uˮ;
4)ÓЧ:|ˮVеķûˮеB(ti)D(zhun)鵪?d)⣬ȥˮеĵ|(zh)
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