F(xin)M(jn)Ϣr(sh)ϢѸ͵ڏVƵVҪϢdwdzҪڽҊ(jin)ڷ]ʩF(xin)(chng)Rr(sh)O(sh)ʩ@PVCô؇ʲô̎? (tng)S(chng)ʩˆToҽBһ
؇һڷָp٬F(xin)(chng)ʩȌ(du)IJӰ;һԞ(xing)ĿI(yng)o(xing)ĿҎ(gu)؇VĹ؇Vʽͨͨ^(gu)(hu)Ą(chung)ɫM(jn)ҕX(ju)_(d)
PVCڷmͬr(sh)Ҳ(yng)@ӾиGsʩͬr(sh)ˇL(fng)ķ(wn).
PVC(jng)^(gu)PVC̎혋(gu)ɵһNYϵćһʩЇ·;^y(tng)䓇дO(sh)ƯD(zhun)ʸߵL(zhng)̎ɱȲ䓇50%.
ԓⲿPVC,(ni)r\䓹(jng)^(gu)ͬҎ(gu)һwͣȫo(w)c(din)ȫw(qing)^eˇ̎(gu)ɵño(h)Ĥʹ흙(rn)ƽ̹P坍ɽBҴD(zhun)
ḅט(gu)→bð→bM→bÇ→؏(f)ǰ^(gu)ҪO(sh)ÇĮ(dng)?sh)M(jn)еϵӲSײ_(ti)Ę(gu)ȻM(jn)Їb
bҪҪڇ̎ײÉ|Ƭ|֮ݽzM(jn)ܵĹ̶_(ki)˴O(sh)MM(jng)^(gu)M(jn)A(y)Ķ㕽KMgbÇ塣