| 摘要 |
THE DRAWING DEVICE (1) COMPRISES A DRAWING BLOCK (7), A TRACTION DEVICE (16) AND IS CHARACTERIZED IN THAT A)SAID TRACTION DEVICE (16) IS COMPRISES TWO DRIVING BELTS. B)SAID DRAWING DEVICE COMPRISES AN AUTOMATIC ENGAGEMENT DEVICE (19), C)SAID AUTOMATIC ENGAGEMENT DEVICE 19 COMPRISES AN AUXILIARY TRACTION MEANS (20) PROPELLED WITH POWER BY SAID TRACTION DEVICE (16). THE INVENTION COMPRISES A DRAWING LINE COMPRISING SEVERAL DRAWING DEVICES. (FIG. 3)
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