Adrodd fel Amhriodol
Testun Gwreiddiol (Anodiad: EPW062611 / 1123109)
'
"Patent Slip", a carriage which rolls down tracks into the water to allow a ship to be positioned over it. As the tide falls, the ship settles on the carriage and they can be then hauled out to allow repairs to be done to normally underwater areas of that vessel. '