Symbols representingthese valves provide awealth of information about the valve it represents. Symbols show the meth-ods of actuation, the number of positions, the flow paths and the number of ports. Hereisabriefbreakdown of how to read asymbol: Every symbol has three parts (see figuretoright).
Description. Safe Harbor Dam is a dam located just 5.7 miles from Millersville, in Lancaster County, in the state of Pennsylvania, United States, near Lockport, PA.escription. Safe Harbor Dam is a dam located just 5.7 miles from Millersville, in Lancaster County, in the state of Pennsylvania, United States, near Lockport, PA.
Gig Harbor, WA. {{::location.tagLine.value.text}}. Sponsored Topics. During a turbulent storm in 1840, Captain Charles Wilkes brought his small boat, called a gig, into a small bay for protection. When he published a map of Washington state a year later, he dubbed this picturesque spot Gig Harbor, and the name stuck.