Les beat me !

The Body actor has no geometry of its own , its simply a set of controls for other body parts.

Every body part has 50 PBMCC and 50 PBMDC channels. The DC is for DAZ to use and CC are community for other developers or you to use.  PBMCC_70 makes no sense , there should be only 50 channels.

The bodymorphs are setting Full body morphs. Thats sort of a control dial within BODY actor that sets morphs on each body part that combined make a full body morph. (not quite sure on that one)

 The k line is keyframes so k 0 0.5 says set this parameter to 0.5 at frame 0 , and I think its relative to the scene current frame.  If the pose was animated you would get multiple k lines, one for each keyframe.

When a channel is not in use , its dial is hidden and it will show numdeltas 0 and have no name (or rather a _ where the morph name will be )

 

Inj poses use an existing channel , they do not create them.