The first mass filter stage transmits only ions having a sub-range of mass-to-charge ratios including a selected mass-to-charge ratio.
所述第一滤质器级布置成用于仅传输具有一子范围的质荷比的离子，该子范围包括所选的质荷比。
A series of Al-Al explosive welding experiments were carried out to investigate the morphology characters of welding interface under the condition of different charge ratios.
对铝-铝同质金属爆炸焊接进行系列实验，研究不同装药比条件下焊接界面的变化特征。
They are one of the most popular types of battery for portable electronics, with one of the best energy-to-weight ratios, no memory effect, and a slow loss of charge when not in use.
他们是在便携电子产品领域中最流行的一种电池类型，具有最好的能重比，没有记忆效应，并且在不使用的情况下，充电损失比较慢。
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