Ј(chng)ʿA(y)Ӌ(j)Ƅ(dng)ȫϩ(PVC)Ј(chng)^m(x)L
^ȥ10ЇPVCһ2019꿂_(d)2000fӲ|(zh)ܵPVCռ˿(sh)һܛĤƬЇܛ|(zh)PVCa(chn)ƷڇԽΣC(j)ԁЇU(ku)ʯԭϵPVCa(chn)ЇһȳF(xin)^ľa(chn)(ҲϩPVC)^(ni)1000fȻԭ̓r(ji)µʯԭPVCĸ(jng)(zhng)½S(ni)Lȱ(jng)(zhng)̱̭ƽõmȻЇ(jng)PVCM(jn)ڇÿM(jn)200fS(ni)a(chn)m(x)M(jn)һֱ½ֵעǣ2020ЇPVCM(jn)8״γ^100f
⣬ӡȽc(din)l(f)չO(sh)ʩӡȌ(du)r(nng)I(y)ܵҲڳm(x)ӡȳ^70%PVCڹܵˮˮܵȻMӡPVCʢ(ni)a(chn)܅s]L5ҹ˾Ӌ(j)a(chn)ֻ150f/ӡPVCM(jn)2019L10%_(d)214fձPVCa(chn)̄tɞߣF(xin)ѽ(jng)^Ї_(ti)nɞӡPVCa(chn)ƷԴ