However, most of automatic feedback suppressors in domestic market are imported from oversea and expensive.

但是，目前市面上的自动声反馈抑制产品，大多是国外品牌，价格不菲。

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Because the automatic feedback and auxiliary heater techniques are used in this standard, the measuring time is greatly reduced, and a high calibration speed is gotten.

该标准采用了自动反馈和辅助加热器技术，大大缩短了测量时间，提高了校准速度。

youdao

Because the automatic feedback and auxiliary heater techniques are used in this standard, the measuring time is greatly reduced, and a high calibration speed is gotten.

该标准采用了自动反馈和辅助加热器技术，大大缩短了测量时间，提高了校准速度。

youdao