Both! Ultrasound Tech, or Technician, is the same as Sonographer. You may also hear the term Diagnostic Medical Sonographer as well as Ultrasonographer.Each of these titles refers to the profession of operating ultrasound machines, which produce images used to diagnose and treat patients.oth! Ultrasound Tech, or Technician, is the same as Sonographer. You may also hear the term Diagnostic Medical Sonographer as well as Ultrasonographer.
Flip-flop hub. Flip-flop hubs, also called double-sided hubs, are rear bicycle hubs that are threaded to accept fixed cogs and/or freewheels on both sides. There are several different types of flip flop hubs available for different applications. Their main purpose is to allow changing between two different size gear ratios on one rear wheel without the added complications of a derailleur or internal hub gear, or between a fixed and freewheeling option.
On a regular rear wheel, there are cogs on just one side of the hub â the drive side. On a flip-flop rear wheel, there is a single cog on either side of the hub (although you only use one at any given time). One of is a fixed cog, and the other is a freewheel. The freewheel body means that the rear wheel can turn even when youâre not pedaling. In a word, it allows you to coast. A Flip-Flop Hub (such as the one on the Montague Boston) has a cog on either side â one that is fixed and the other that freewheels. On a fixed gear, you canât coast. If the bike is moving, your legs need to be moving.