China National Standards

China Mechanical bell timer Industry Standards English PDF List

  •  China "Mechanical bell timer" Industry Standards English PDF List:
    • Standard  Code Standard Title Standard Class Order
    QB/T 2258-2023 Mechanical bell timer {译}
    机械式响铃定时器    		 China Light Industry Industry Standards
    Mechanical bell timer
    English PDF
    QB/T 2258-1996 (Mechanical bell timer)
    机械式响铃定时器    		 China Light Industry Standards
    Mechanical bell timer
    English PDF

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