例句與造句

1. In 1933 selenium rectifiers were invented.
2. Solid-state technology was in its infancy, represented by copper oxide and selenium rectifiers.
3. Selenium rectifiers were generally more efficient than metal-oxide types, and could handle higher voltages.
4. They were replaced in power supplies beginning in the 1940s by selenium rectifiers and then by semiconductor diodes by the 1960s.
5. The development of selenium rectifiers began during the early 1930s, and these replaced copper oxide rectifiers because they were more efficient.
6. It's difficult to find selenium rectifier in a sentence. 用selenium rectifier造句挺難的
7. Though once widely used, selenium rectifiers have mostly been replaced ( or are being replaced ) by silicon-based devices.
8. Zenith used a selenium rectifier of later versions of the T / O, replacing rectifier tubes used on the earlier models.
9. These selenium rectifiers were used ( and are still used ) to convert alternating current to direct current in electrical power applications.
10. Selenium rectifiers were once widely used as high-tension rectifiers in transformerless radio and TV sets, before cheaper silicon diodes became available.
11. The Harvard was a fixed bias amplifier, using a basic cathodyne phase inverter, but did include a selenium rectifier in the bias circuit.
12. Another possibility is a selenium rectifier, which could have been used in the time before semiconductors . talk ) 21 : 43, 10 May 2014 ( UTC)
13. It used a selenium rectifier, came mounted on a wheeled chassis to make it easier to move around a garage, and could charge a starter battery in about an hour.
14. Anything else, like selenium rectifier, for instance, does not come in small signal packages . "'Sp in ni ng Spark "'12 : 57, 3 January 2010 ( UTC)
15. There were even a few " AA4 " designs, usually midget sets, only usable in strong-signal metropolitan areas, because most had no IF amplifier ( although some replaced the rectifier tube with a selenium rectifier ).
16. In some countries the term " metal rectifier " is applied to all such devices; in others the term " metal rectifier " normally refers to copper-oxide types, and " selenium rectifier " to selenium-iron types.
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