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crania

n. [解]头盖骨;脑壳

crura

n. 下肢(crus的复数);腿;似腿的部分

cr123a
  • 百科
  • CR123A

    This article lists the sizes, shapes, and general characteristics of some common primary and secondary battery types in household and light industrial use. A battery may consist of a single cell, or two or more cells in a single package (for example, the 1604 9-volt battery which has six cells).The long history of disposable dry cells means that many different manufacturer-specific and national standards were used to designate sizes, long before international standards were agreed upon. Technical standards for battery sizes and types are published by standards organizations such as International Electrotechnical Commission (IEC) and American National Standards Institute (ANSI). Many popular sizes are still referred to by old standard or manufacturer designations, and some non-systematic designations have been included in current international standards due to wide use.The complete nomenclature for the battery will fully specify the size, chemistry, terminal arrangements and special characteristics of a battery. The same physically interchangeable cell size or battery size may have widely different characteristics; physical interchangeability is not the sole factor in substitution of batteries.

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