| A | B |
|---|
 | Altenator-Fixed |
 | Altenator-variable |
 | Ammeter |
 | Capaciter |
 | Circuit-Breaker |
 | antenna |
 | battery |
 | capacitor |
 | circuit breaker |
 | delay 1 |
 | delay 2 |
 | diode |
 | diode light emitting |
 | diode zener |
 | directional coupler1 |
 | directional coupler2 |
 | female contact |
 | fuse 1 |
 | fuse 2 |
 | ground chassis 1 |
 | ground chassis 2 |
 | ground earth |
 | inductor air core |
 | inductor bifilar |
 | inductor iron core |
 | inductor variable 1 |
 | inductor variable 2 |
 | integrated circuit |
 | inverter |
 | male contact |
 | negative voltage |
 | operational amplifier |
 | potentiometer 1 |
 | potentiometer 2 |
 | rectifier semiconductor |
 | rectifier silicon controlled |
 | resistor |
 | resonator |
 | rheostat 1 |
 | saturable reactor |
 | shielding |
 | signal generator |
 | switch momentary |
 | switch rotary |
 | terminals balanced |
 | terminals unbalanced |
 | test point |
 | transformer air core |
 | transformer iron core |
 | voltmeter |
 | wires connected crossing 1 |
 | wires connected crossing 2 |
 | wires not connected crossing 1 |
 | wires not connected crossing 2 |
 | wires |
 | Diode |
 | Diode-Reverse-Blocking |
 | Diode-Reverse-Conducting |
 | Filament-Lamp |
.gif) | Flow-Switch-(Normally-Closed) |
.gif) | Flow-Switch-(Normally-Open) |
.gif) | Fused-Switch-Open-Contact-(Normally-Open) |
 | Inverter |
.gif) | Lamp-(Flashing) |
 | Lamp |
 | Lamp 1 |
.gif) | Limit-switch-(Normally-Closed) |
.gif) | Limit-Switch-(Normally-Open) |
 | Normally-Closed-Contact |
 | Normally-Open-Contact |
.gif) | Pressure-switch-(Normally-Closed) |
.gif) | Pressure-Switch-(Normally-Open) |
.gif) | Pull-Switch-(Normally-Closed) |
.gif) | pull-Switch-(Normally-Open) |
 | Rectifier |
 | Relay |
.gif) | Rotary-Switch-(Normally-Closed) |
.gif) | Rotary-Switch-(Normally-Open). |
.gif) | Temperature-Switch-(Normally-Closed) |
.gif) | Temperature-Switch-(Normally-Open) |
 | terminal-Block |
.gif) | Thermal-Switch-Overload-(Normally-Closed) |
.gif) | Thermal-Switch-Overload-(Normally-Open) |
.gif) | Time-Delay-(Narmally-Closed) |
.gif) | Time-Delay-(Narmally-Open) |
.gif) | Transister-(NPN) |
.gif) | Transister-(PNP) |
