OBC-31S yog cov roj polymer zoo cement kua dej poob additive.Nws yog copolymerized nrog AMPS / AM, uas muaj kev tiv thaiv zoo rau qhov kub thiab txias, raws li lub ntsiab monomer, ua ke nrog lwm cov ntsev-tso rau monomers.OBC-31S muaj qhov dav thov kub, siab kub re ...
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