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  <controlfield tag="003">Thư viện trường Cao đẳng Kỹ thuật Cao Thắng</controlfield>
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   <subfield code="a">RG_1 #1 eb0 i1</subfield>
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   <subfield code="a">Tiêu chuẩn Việt Nam: Cân, quả cân: TCVN 4535-88; 4988-89; 4989-89; 2647-91; 5549-91; 5550-91; 5551-91; 5552-91 /</subfield>
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   <subfield code="b">Ủy ban khoa học kỹ thuật nhà nước ,</subfield>
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   <subfield code="a">Tiêu chuẩn này thay thế TCVN 3157-79 và các mục 1 của các TCVN 3158-79; TCVN 1971-77.</subfield>
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   <subfield code="a">Tiêu chuẩn này quy định yêu cầu kỹ thuật của quả cân chuẩn và quả cân công tác có khối lương từ 1mg đến 50kg. Tiêu chuẩn không áp dụng cho các quả cân có công dụng đặc biệt - quả mắc sẵn, quả con mã, quả ca rat, quả trong cân tự động.</subfield>
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   <subfield code="a">Tiêu chuẩn phù hợp với ST.SEV 717-77 và các kiến nghị của tổ chức đo lương hợp tác quốc tế IR 20, IR1, IR2.</subfield>
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