force, electro-magnetic

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NOW 2 kNOW Electro-Magnetic Fields from $19.95	QWORK Electric Magnetic Lock, 60kg 130LBs Holding Force Electric Magnetic Lock for Door Access Control System Electromagnet Fail-Safe NC Mode from $13.47
FUGEST 350Lbs(180KG) Holding Force Electromagnet Magnetic Electric Lock 12V Singe Door $22.50 from $20.03	FERUERW 600LBs/280KG Electric Magnetic Lock,Electromagnetic Door Lock Holding Force for Access Control,OutSwinging Door Access Control System,Single Door 12V $29.99 from $25.24
Electromagnetic Lock with Z and L Bracket 280KG 600LBS Holding Force Electric Magnetic Door Lock 12V Fail Safe NC Mode for Access Control System $49.99 from $23.91	Electric Magnetic Door Lock 60KG / 130LBS Holding Force 12V NC Mode Single Door Electric Magnetic Access Control Lock for Metal Door/Fire Proof Door/Wooden Door/Glass Door etc. (60 kg/130 lbs)… from $19.99
QWORK Electric Magnetic Lock, 2 Pack 60kg 130LBs Holding Force Electric Magnetic Lock for Door Access Control System Electromagnet Fail-Safe NC Mode from $24.97	szzijia 55LB 25kg Electric Lifting Magnet Electromagnet Solenoid Lift Holding 40mm from $16.19
Electro Magnetic Force [Explicit] from $0.99	The Spinning Magnet: The Electromagnetic Force that Created the Modern World - and Could Destroy It from $15.75