[No.60] [RF 1641 p.20] [part]

[vertical orientation]

[diagram]  joint	[diagram]  abacus entirely separate



			cabling [exceptionally?] rich. in notches thus [diagram]


being flat

   Fig 4


		a      b	[diagram]  Fig 3		B [diagram]  Fig 3

				No  60. page 80

[Version 0.05: May 2008]