空白边的英文：
lay edges

参考例句：

In word processing, to print a document with even right and left margins.
字(词)处理技术中,使打印文件有平齐的左右空白边。

lay是什么意思：
v. 放，搁；铺设，砌（砖）；产卵；打赌；提出；把...归于；lie的过去式
n. 位置

Lay the floor with a carpet. [Lay a carpet on the floor.]
把地毯铺在地板上。

lay under tribute
使处于从属地位

The invalid lay propped on the pillows.
那病弱者倚靠在枕头上。

Lay stress on / upon
着重,重视

Lay something to heart
铭记在心

edges是什么意思：
n. 边，边缘；刀，刀口
v. 使徐徐移动；给...加边

The number of incoming edges is equal to the number of outgoing edges
进入的线数等于离去的线数。

pipe edges sewing machine
滚边缝纫机

Sloth turneth the edge of wit
懒惰会磨去才智的锋芒

The knife's edges have blunted.
这刀刃已变钝了。

Gripper edge: Edge of a sheet to be gripped by the grippers of a printing machine.Also called Feed edge,Leading edge.
夹牙边:被印刷机上的夹牙抓牢的纸边。亦称前纸边，纸头。