"String mains 3lbs t" (what does it mean?)

sstchur

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In the following instructions:

Hyper Hammer 5.6 w/Rollers Oversize 110
String Tension : String mains 3 lbs t
String Length : 38' (ss:10') or (20' M's and 18' X's)
String Pattern : 16 x 21
Start Main : at Throat. Mains skip 7H, 9H, 7T and 9T. Tie off M's at 6T.
One Piece : Start X's at Bottom at 7T. Top X: 7H. Tie off X's at 5H.
Two Piece : Start X's at Top at 7H. Bottom X: 7T. Tie off X's at 5H and 11T.
Notes : If one-piece method: Short side must be installed on side marked "short side". If two-piece method: Starting knot must begin at 5H hole marked "cross tie off".

Does "String mains 3lbs t" mean, string the mains at 3lbs higher tension than the crosses? Or something else entirely?

And would it mean that you pick your desired tension, say 62, and then string the mains at 65 and the crosses at 62?
 
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