By Terry Bartelt
By Stephen Schneider
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The initial illustration shows a cylinder that needs to EXTEND to raise the load! However, the remainder of the example shows a cylinder that must RETRACT to raise the load!!!
In this animated and interactive object, learners identify the valves and chambers of the heart.
In this animated activity, learners examine the operation of hydraulic directional control valves and the internal components that divert the fluid.
Learners study an animation of a spring-and diaphragm actuator controlling the opening of a flow valve.