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八、免提通话电路徒弟:免提通话电路在使用上有何好处? 师傅:用普通电话机打电话,在整个打电话过程中。打电话者为了腾出手来。不得不把手柄夹在脖子
Eight, hands-free calling circuit Apprentice: hands-free calling circuit in the use of what is the advantage? Master: ordinary telephone to call throughout the call. The caller frees his hand. Have to grip the handle on the neck