短語詞組短語limit packing ring 限制圈;限制環(huán)only limit ring 唯一極限環(huán)Only one limit ring 極限環(huán)惟一性algebraic limit ring 極限環(huán)Definite Limit Ring 定性極限環(huán)position -limit ring of guiding 導(dǎo)向限位環(huán) 返回 limit ring