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By certification 
Name: non sparking combination wrench
Material: Be-Cu,Al-Cu,die forged products
Size:6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26, 27,30,32,34,35,36,38,41,46,50,55,60,65,70（mm)
Material: Be-Cu,Al-Cu,die forged products
Size:6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26, 27,30,32,34,35,36,38,41,46,50,55,60,65,70（mm)
