plastic ring binding 塑料圈装 ; 何谓塑胶圈装
metal ring binding 何谓金属圈装
ring-binding 环扎
binding ring 锁紧环 ; 定位圈
Ring of Binding 禁锢之戒
Runed Ring of Binding 禁锢符文之戒
Ring binding: A form of loose leaf binding in which two or more rings pass through punched holes AT the edge of the paper.
铁环装：是活页装的一种。它用两个或以上的铁环，穿过在纸边打孔的纸张。
Coal tar processing is one of the most important areas of coal chemical technology and a main intermediate ring binding coal mining, metallurgy and chemical industry.
煤焦油加工是煤化工的重要内容之一，与煤炭、冶金和化工等行业密切相关，在世界范围内已有相当规模。
The ring binder and the post binder are examples of loose leaf binding.
例如铁环活页夹或螺柱活页夹都是活页装的一种。
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