Gb/T 20254 2025. Physical properties of gb qfe0.1 gb/t 20254.1 mainly cover modulus of elasticity, coefficient of thermal expansion, thermal conductivity, specific thermal capacity, electrical resistance value,. 关键字： gb/t 20254 × 特别声明.
Copper copper alloy strips lead frame—part 1: 关键字： gb/t 20254 × 特别声明.
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