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旋转稳定脱壳穿甲弹用钨合金棒材规范
Specification for bar-blanks of tungsten alloy for spin-stabilized armor-piercing discarding sabot projectile
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钽粉
Tantalum powders
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铌酸锂单晶
Lithium niobate single crystals
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钼及钼合金加工产品牌号和化学成分
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钨及钨合金加工产品牌号和化学成分
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海绵锆
Sponge zirconium
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合成白钨技术条件
Technical requirements of synthetic scheelite
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钽粉
Tantalum powder
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铌及铌合金加工产品牌号和化学成分
Designation and composition of wrought niobium and niobium alloy
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高纯五氧化二铌
High-pure niobium pentoxide
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