1:Pedal valve

2:Three knife switch

3:Double knife switch

4:Single pole switch

5:Key switch group BS460

6:The 12 key switch group

7:The 11 key switch group

8:Control button

9:Foot switch

10:Key switch group main table -BS450

11:Turn key switch group vice table -BS360

12:Key switch

13：Knife switch THD4A





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