圆珠笔笔芯|坦桑尼亚标准|TZS 421:1989
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圆珠笔笔芯|坦桑尼亚标准|TZS 421:1989
TZS 421:1989
Ball point pen refills – Specification
Prescribes the requirements for ball point pen refills made entirely from metal and plastic materials
圆珠笔笔芯–规格
规定了完全由金属和塑料制成的圆珠笔笔芯的要求
TZS 421:1989
Ball point pen refills – Specification
Prescribes the requirements for ball point pen refills made entirely from metal and plastic materials
圆珠笔笔芯–规格
规定了完全由金属和塑料制成的圆珠笔笔芯的要求
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