China National Standards

China Wrench openings Tolerances GB Standards List

  •  China "Wrench openings Tolerances" GB Standards List:
    • Standard  Code Standard Title Standard Class Order
    GB/T 4390-2008 Wrench openings - Tolerances for general use
    扳手开口和扳手孔 常用公差    		 China National Standards
    Wrench openings Tolerances
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