线装的英文：
traditional thread binding

参考例句：

Sewn soft cover
软皮线装

Sewn case cover
硬皮线装

This historical book is thread-bound.
这本历史书是线装的。

The evaporator vapor lines are fitted with an entrainment separator
蒸发器的蒸汽线装有雾沫分离器。

The evaporator vapor lines are fitted with an entrainment separator.
蒸发器的蒸汽线装有雾沫分离器。

French sewing: Plain ,conventional sewing.Also called Section sewing.
法国式线装:常用的单纯线装定。也称连贴锁线定。

Sewn soft cover: A method of binding in which section sewn signatures are fastened to a paper cover.
软皮线装:装订方法之一;它把锁线订后的各帖，装入纸书皮内。

traditional是什么意思：
adj. 传统的，惯例的；因袭的

He deserted this classical tradition.
他抛弃了古典的传统。

the traditional breakfast is congee,
传统的早餐一般包括粥，

It indicates the antiquity of the tradition.
这表明该传统源远流长。

thread是什么意思：
n. 线，棉线，毛线；丝状体；螺纹；头绪，思路
v. 穿线于…，装胶片于…；通，通过；穿成

pipe bend with female thread
两头带阴螺纹的弯头

To hang by a hair thread
千钧一发

There is a common thread in these two stories.
这两个故事之间有个共同的线索。

binding是什么意思：
n. 封面；镶边；捆绑（物），装订（物）；粘合剂
adj. 捆绑的；粘合的；有约束力的，应履行的
v. bind的现在分词；装订

Bind the sack before it be full
做事应适可而止

A binding or enclosure for a book or magazine.
书皮，封面书或杂志的镶边或封皮

To bind or decorate with or as if with a fillet.
用带缚或装饰用或似乎用饰带系或装饰。