China National Standards

China 90°，120° GB Standards List

  •  China "90°，120°" GB Standards List:
    • Standard  Code Standard Title Standard Class Order
    GB/T 1143-2004 Morse taper shank countersinks for angles 60° and 90°，120° inclusive
    60°、90°、120°莫氏锥柄锥面锪钻    		 China National Standards
    90°，120°
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