What is the best type of resistor to use - metal film, carbon film, or carbon composition?
金膜电阻，碳膜电阻以及碳合成电阻哪一种最好？
A carbonaceous heat source composition for a non-combustion type smoking article according to the present invention includes carbon and 0.5 to 5% by weight of a polyhydric alcohol.
一种非燃烧型吸烟物品用碳质热源组成物，其包含有碳，且含有多元醇的比例是0.5 ~ 5%重量。
A portable and rotary type ultrasonic drilling machine is developed and designed for drilling of carbon fibre composition components.
为碳纤维复合材料构件的钻孔，研制出一种便携式旋转超声钻。
A portable and rotary type ultrasonic drilling machine is developed and designed for drilling of carbon fibre composition components.
为碳纤维复合材料构件的钻孔，研制出一种便携式旋转超声钻。
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