“金属环”的英语

“金属环”的拼音为：jīn shǔ huán...

金属环把橡皮头固定到每一根铅笔上.A ferrule and eraser are crimped into place on each pencil.罗杰把绳子牢牢地拴在金属环上.Roger made the rope fast to the metal ring.常用的是变价金属环烷酸盐和异辛酸盐.The common driers are metal octoate and metal naphthenate....