adding machine

Noun

A simple mechanical or electromechanical calculator that could only perform simple calculations such as addition or subtraction

Japanese Meaning

単純な計算（加算や減算など）のみが可能な、機械式または電気機械式の計算機。 / 加算法のみを実行する、簡易な計算専用機械。

Grandfather kept his old adding machine on the desk, its yellowed keys worn smooth by decades of simple calculations.

祖父は古い加算専用の機械式計算機を机に置いていて、何十年にもわたる簡単な計算で黄ばんだキーがすり減っていた。

Sense（1）

A simple mechanical or electromechanical calculator that could only perform simple calculations such as addition or subtraction

adding machines

（ plural ）