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[[Category:Indicators]]{{Knoppen}} | [[Category:Indicators]]{{Knoppen}} | ||
Full, empty or demand indicator with reinforced blade shaft | |||
- mainly as empty or demand detector | |||
- the reinforced blade shaft prevents the buckling of the shaft even if there is a breakdown of bulk bridging | |||
- expensive protecting roofs are not needed | |||
- as full indicator, if the blade shaft has to resist against heavy loads |