墨糸（すみいと）とは？【建築用語・土木用語・大工用語】 墨糸（すみいと）とは、墨壺についている、材木にまっすぐな線を引くための糸のことをいいます。 Please Share This Share this content Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window
