OT. How's a pop can made?

Bill Hammack, the engineer guy explains how some things are made or work.
Why is the other line faster? The explanation is related to early phone systems. >https://www.bing.com/videos/search?q=engineerguy+youtube&&view tail&mid56DC06A7CF328B49C5AF56DC06A7CF328B49C5&&FORM=VDRVRV>
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file

Site Timeline

HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.