One type of microphone, called a PZM (pressure zone microphone), is ideal for speech and can be easily placed on a podium or table.
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PZM pressure zone microphone 压力区话筒
PZM M pressure zone microphone 压力区话筒
In conclusions, (1) PZM-3 was better than NCSU-23 in hatch of porcine PA embryos.
以上结果表明：（1）与NCSU-23相比，PZM-3更适合猪孤雌激活胚胎囊胚孵化期的发育。
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