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Mechanically Actuated Water Level Detection Float Ball Switch with Mercury Switch | Technovation-technological innovation and advanced industrial control technologies
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Mercury (Hg) Pilot Duty | Control Panel Float Switch - Normally Open - Narrow Angle - Skived Cord Ends - 30 Foot Cord
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Sludge Boss Septic Float Switch, Heavy-Duty Sewage Pump Switch for Viscous Liquids and Suspended Solids in Wastewater, Mercury-Free Self-Orienting Tank Float for Septic Pumps to 1/2 HP (33 Ft Cable) - Amazon.com
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Stainless Steel Mercury Float Switch - China Float Switch, Water Level Controller | Made-in-China.com
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