float boards造句

All you need is to tie the one end of the rope with the motor board and the second to the float board or aquaplane.
To make the mere motion backwards and forwards of a float board, indicated on a graduated index, convey a great number of words or letters, is the difficulty to be overcome . }}
To each end of a column he attaches a float board with an index, and the depression of any given number of figures on one index, will be immediately followed by a corresponding rise of the float board and index at the other end.
To each end of a column he attaches a float board with an index, and the depression of any given number of figures on one index, will be immediately followed by a corresponding rise of the float board and index at the other end.
It's difficult to find float boards in a sentence. 用float boards造句挺难的