例句與造句

1. The 955 is one of about a dozen types of " acorn valve ", so called because their size and shape is similar to the acorn ( nut of the oak tree ), designed to work in the VHF range.
2. An "'acorn tube "', or "'acorn valve "', refers to any member of a family of UHF vacuum tubes starting just before World War II . They were named after their resemblance to the acorn, specifically due to the glass cap at one end of the tube that looked similar to the cap on an acorn.
3. It's difficult to find acorn valve in a sentence. 用acorn valve造句挺難的