............................................... 07
............................................. 09
6-1.
6-2.
6-3.
6-4.
6-5.
6-6.
6-7.
6-8.
(B721/B723) ........................................... 18
6-9.
Lubrication ............................................ 19
7-1.
7-2.
7-3.
7-4.
7-5.
7-6.
7-7.
......................................................... 29
8-1.
Sewing .................................................. 30
8-2.
Backtacking ........................................... 30
CONTENTS
...................... 01
..................... 03
.............. 05
.................................. 08
........... 21
DB2-B720 series (English)
...................................... 31
9-1.
9-2.
pressure ................................................ 32
9-3.
..................................................... 35
spring .................................................... 40
hook timing ........................................... 49
(B722/B724) ........................................... 52
................... 39
................ 54
................................. 56