### device:

Trumpet
* Most trumpets have valves of the piston type, while some have the rotary type.
* Some trumpets have pipes.
  - horns
  - brass bands
  - music stores
  - made of brass
  - solids
  - trumpeters
  - used for fanfare
* can sound alarm or celebration.
* have purposes.
* play an important part in Jazz music, and other various popular genres.
* typically produce larger but readily transplantable bulbs.
+ Trumpet, Music for trumpet: Brass instruments :: Jazz instruments
  * Classical music is written for solo trumpet, and trumpets are included in orchestras. Trumpets play an important part in Jazz music, and other various popular genres. Sometimes, they also play short parts to emphasize sections in rock songs.

### device | tuba:

Euphonium
* are basically silver and brass in colour
  - brass instruments
  - usually bell up instruments, as seen in the picture
* comes from the Greek word for sweet voiced, hence the adjective euphonious.
* usually supplement the melody line, and sometimes are used as solo voices.

Vaporizer
* Never leave vaporizer unattended or near combustibles.
* are existing technology that can be rapidly tested and improved
  - less portable and concealable than pipes
  - only useful where there is electric power
* produce a warm stream, which can be used for cough and cold symptoms.
* sometimes fail to satisfy longtime smokers who associate burning lungs with getting high.

Various device
* can regulate and control many aspects of the living environment.
* powered by line voltages employ transistors and relays as switches.

Ventilator
* Some ventilators are much noisier than others.
* are also use for patients who have suffered heart attacks, seizures and strokes
  - devices
  - medical devices
  - part of ventilation
* help keep the airsacks open, allowing oxygen to reach the blood vessels in the lungs
  - premature babies with immature lungs to breathe
* provide short-term support for patients during surgery, severe pneumonia or accidents.

### device | ventilator:

Snorkel
* Some snorkels have a flexible section near the mouthpiece
  - move the point where the air is taken in, to as high as the roof
* are most useful where the contaminant releases are localized
  - part of submarines
  - sports equipment
* feature a soft mouthpiece and a mask attachment loop.

Videotape
* are magnetic tape
  - video recordings
* have a polyester base that has a polyurethane coating.
* includes sections.
* is tape

### device:

Violin
* are acoustic instruments
  - also more difficult to identify than works of art
  - brown
* are located in cabinets
  - operas
  - schools
  - string quartets
  - stringed instruments
* are used for entertainment
  - playing
* have string
  - the brightest tone and the highest range, and basses the lowest range and darkest tone
* includes bases
  - sound holes
* is string
+ Classical music, Use of the term "classical music", Instruments used: Music genres
  * In general, musical instruments have become louder as concert halls have become bigger. Violins are louder than viols. Modern violins are louder than the early 17th century violins, largely because of they have metal strings instead of gut strings. The piano developed from the clavichord which was very quiet indeed. Woodwind instruments developed from Renaissance instruments, while the clarinet was invented in the middle of the 18th century, and the saxophone and tuba came even later. Modern trumpets sound much brighter than the straight trumpets of the 18th century.

Vise
* Many vises have heads that pivot or rotate.
* Some vises have jaws that are too big to use with a variety of hooks.
* are indispensable woodworking tools
  - industrial equipment
  - located in garages
  - mechanical devices