API donut

名词 n.
英 /ˌeɪpiːaɪ ˈdəʊnʌt/    美 /ˌeɪpiaɪ ˈdoʊ(ˌ)nʌt/

英文释义

名词 n.
  1. An information table found on cans of motor oil, conforming to U.S. standards, which indicates the weight (viscosity) and type of oil. The central circle provides the oil viscosity rating (ie. 10W50), while the upper annulus section provides the oil type (ie. SP). US

词形变化

API donuts plural

词源

From API + donut; from American Petroleum Institute, and its shape.
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