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繻ٹŹդ ҹҹ ͫ࿵٧ ( SULPHATE RESISTANT CEMENT )

ԵسҾͧٹ سѵԶ١ͧ 仵ࡳ˹ҵðҹصˡ ٹŹ ͡. 15 1-2547 ҵðҹԡѹ ASTM C-150 TYPE 5繻ٹѺҹçҧ㹷 çҧ㹺dzմԹ ҹҧоҹ Ҥ 觻١ҧ