A data channel on which the information transmitted can take any value between the limits defined by the channel. Voice - grade channels are analog channels.
一种数据信道，其传输的信息可取该信道规定界限内的任何值。话音信道就是模拟信道。
Check the dimensions of dug pipe channel, especially the grade level, inclination against design requirements, check to see whether the bedding is rammed hard enough.
检测开挖的管槽尺寸，特别是水平高程、斜度是否满足设计要求，垫层是否夯实。
Using professional-grade multi-channel elec volume control, high reliability;
采用专业级多信道电子音量控制，长寿命永不磨损高可靠性；
Using professional-grade multi-channel elec volume control, high reliability;
采用专业级多信道电子音量控制，长寿命永不磨损高可靠性；
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