Kev lag luam xov xwm
Vim li cas thiaj yog PP tsev neeg zaj duab xis los ua kev xaiv ntse rau tsev niaj hnub?
Hauv kev hloov pauv niaj hnub, cov neeg tab tom nrhiav cov khoom uas muaj kev nyab xeeb thiab siv tau rau kev siv txhua hnub. PP tsev neeg zaj duab xis tau maj mam dhau los ua cov khoom siv uas nyiam tshaj plaws hauv tsev vim nws cov qauv tsim nyog, lub teeb yuag, thiab cov khoom siv hauv eco.
Nyeem ntxiv
Dab tsi yog qhov sib txawv ntawm PVC zaj duab xis, tsiaj zaj duab xis thiab pp zaj duab xis?
Rau cov chaw tsim khoom muag, kws tsim khoom lag luam thiab cov tsim qauv, xaiv cov yeeb yaj kiab zoo nkauj heev, thiab nws yog ib qho tsim nyog yuav tsum tau coj mus rau hauv tus account zoo nkauj, thiab nws yog ib qho tsim nyog yuav tsum tau coj mus rau hauv tus account zoo nkauj, thiab nws yog ib......
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Cov txiaj ntsig ntawm kev siv cov rooj tog zaum ob tog li cas?
Rau cov chaw tsim khoom muag, cov neeg tsim qauv sab hauv thiab cov tswv yim hauv tsev zoo nkauj, kav dej ruaj khov thiab muaj nuj nqis, PVC rooj tog zaj duab xis tau dhau los ua cov tshuaj zoo tshaj plaws. Raws li ib tug coj tsim kev tsim kho tshiab, yav tom ntej cov qauv tsim qauv thiab cov qauv z......
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PVC yog dab tsi?
Qhov tseem ceeb, PVC yog hom ntawm lub tshuab nqus tsev ua yeeb yaj kiab siv rau saum npoo av ntawm ntau lub vaj huam sib luag, yog li nws tseem hu ua zaj duab xis zoo nkauj los yog cov nplaum-backed zaj duab xis. Nws cov txheej txheem ntau lawm yog zoo ib yam li ntawm daim ntawv dai, ob qho tib si ......
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