JB/ZQ 4719-2006Diameter of twist drill for drilling hole before inside whorl treatment or car (bore) hole diameter (PDF English) (English PDF)

JB/ZQ 4719-2006 is the English-translated version of 加工内螺纹前钻孔用麻花钻直径或车(镗)孔直径.

JB/ZQ 4719-2006 is the Chinese industry standard "Diameter of twist drill for drilling hole before inside whorl treatment or car (bore) hole diameter (PDF English)". It is in force.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — all pages — is available in the English PDF.

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