drum recorder การใช้

• On display are a helium liquefier and associated tools, devices to measure superconductivity ( e . g . rheostats ), and to automatically record measurements : a cathode tube, a thermograph, drum recorders and a paper tape recorder.
• Give it another 50 years and it'll require someone in a museum to play back Super-8 ( consider the difficulties in replaying a 1900's piano roll recording using one of the myriad of piano roll " formats "-or recovering sound from a 1900's Edison drum recorder or a 1920's wire recorder ).