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SY 6659-2006file.yizimg.com/354088/201729-173048893.pdf · SY/T 6659— 2006 o. 101 325MPa 293. 15K. 2--2000 1990) 4—2000 "i" 4; 1990) GB 4208—1993 (eqv IEC 529: 199B) GB/T11062—199S
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