IEMCA SIR 52 P Manual For Use And Maintenance page 24

2 - TECHNICAL INFORMATION
EN
2.7 FITTINGS - DESCRIPTION
2.7.1 Additional inner lighting lamp
Lamp (A) allows the rear drum area to be lighted,
to make operator's checking easier.
Lamp (B) may be fitted upon customer's request.
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SIR-52-P/F