“金属环”造句

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.