SATO MB400i Operator's Manual page 4

Explanation of hazard symbols
The triangle sign means 'Be
careful'. The content within the triangle
illustrates specific hazards. In this case,
the sign on the left means 'beware of
electric shock'.
The circular sign means 'prohibited'.
The content within the circle illustrates a
specific prohibition. In this case the sign
on the left means 'disassembly
prohibited'.
The black circular sign means
'must do'. The content within the sign
illustrates specific items that must be
carried out. In this case the sign on the
left means 'the plug must be unplugged from the
socket'.
iv
Safety Precautions
Example
Example
Example