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SPST
SPST, SPST, single-pole, single-throw, switch, BOOKS
The vector stencils library " Switches and relays " contains 58 symbols of electrical contacts, switches , relays , circuit breakers, selectors, connectors, disconnect 
Switch and relay symbols
Switch and relay symbols, two way contact, time delay make, open switch, time-delay closing, TDC, time delay make, normally open, time delay break, normally closed, time delay break, closed switch, time-delay opening, TDO, thermostat, temperature switch, temperature sensitive switch, temperature actuated switch, switch disconnector, isolating-switch, stay put, contact without spring return, spring return, make, spring return, break, spring return, shorting selector, make-before-break, shorting, bridging, contact transfer, selector switch, break-before-make, nonshorting, nonbridging, contact transfer, safety interlock, circuit opening, relay contacts, relay coil, relay, pushbutton, make, circuit closing, mushroom head, push-pull head, pushbutton, break, circuit opening, mushroom head, push-pull head, pushbutton, 2-circuit, circuit opening, break, proximity limit switch, directly actuated, spring returned, normally closed, pressure actuated switch, pilot light, passing make-contact, mercury switch, manual switch, manually operated switch, make contact, liquid level actuated switch, limit switch, directly actuated, spring returned, normally open, limit switch, directly actuated, spring returned, normally closed, limit switch, isolator, inertia switch, gas flow actuated switch, fuse, flow actuated, circuit breaker, change-over contact, break contact, SPST, single-pole, single-throw, switch, SPDT, single-pole, double-throw, switch, DPST, double-pole, single-throw, switch, DPDT, double-pole, double-throw, switch, 4 position, switch, 3 position, three-position, switch, 2 position, switch, BOOKS
The vector stencils library " Switches and relays " contains 58 symbols of electrical contacts, switches , relays , circuit breakers, selectors, connectors, disconnect 
CSU/DSU
CSU/DSU , CSU, DSU , BOOKS
The vector stencils library "Cisco WAN" contains 15 symbols of wide area Business and government entities utilize WANs to relay data among PBX switch .
Network diagram sample - System design HOW TO GUIDE

Network Switch . Quickly Create High-quality Network Switch

Network diagram sample - System design
Electrical switch symbols
Electrical switch symbols, weatherproof, circuit breaker, weatherproof switch, weatherproof fused switch, three-way switch, switch, timer, switch, pilot lamp, switch control, single pole, double throw switch, single pole switch, remote control switch, momentary contact switch, low voltage, switch, low voltage, master switch, key operated switch, pilot light, key operated switch, horizontally mounted, switch, glow switch toggle, fused switch, four-way switch, electrolier switch, double pole switch, dimmer switch, circuit breaker, automatic door switch, BOOKS
The vector stencils library " Switches " contains 25 symbols of electrical and light switches A switch that is operated by another electrical circuit is called a relay .
Coaxial Line Tag
Coaxial Line Tag, coaxial line tag, BOOKS
The vector stencils library "Logical symbols" contains 49 logical symbols for drawing logical network topology diagrams. "Logical topology, or signal topology,  
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