管道(A drop-down list on the Campaign Activity form from which users can select the method of distribution for a campaign activity. Values include Phone, Appointment, Letter, Letter via Mail Merge)
管道(The distribution method used for a campaign activity in a marketing campaign); 頻道(A medium for transferring information. Depending on its type, a communications channel can carry information (data, sound, and/or video) in either analog or digital form. A communications channel can be a physical link, such as the cable connecting two stations in a network, or it can consist of some electromagnetic transmission on one or more frequencies within a bandwidth in the electromagnetic spectrum, as in radio and television, or in optical, microwave, or voice-grade communication)
