The effects of X content on the conductivity, thermal conductivity, tin melting rate, dryness, and other physical properties of the new lead-free solder were studied.
研究了X含量对新型无铅焊料的导电性、导热性、熔锡速度和干燥度等物理性能的影响。
Bamboo has excellent physical and mechanical performance, and has the bibulous low expansion coefficient, dryness and deformation advantages.
竹材具有卓越的物理力学性能，并且具有吸水膨胀系数小、不干裂和不变形的优点。
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