gap shear

notch-tow barge

凹尾驳(尾部有顶推凹口

The groove at either end of a bow for holding the bowstring.

弓上的凹口弓两端用来缚弓弦凹口

notch on a serrated edge

锯齿形边缘的凹口.

To put a nock in(a bow or an arrow).

在（弓或箭上）做凹口

The notch in the end of an arrow that fits on the bowstring.

箭上的凹口箭末端的V形凹口，用来搭弓弦

A split or indentation between two parts, as of the chin.

开裂，凹陷两部分间（如下巴）的裂隙或凹口

Oil control ring gap to be located 30 degrees to the left of combustion chamber recess.

控油环间隙位于燃烧室凹口的左30 度。

there were four notches in the handle of his revolver.

把火柴梗一端挖成v型凹口。

has V-shaped notch for pulling off boots.

有V形凹口以便脱靴子的装置。

LEDGE SEATED IN BRAKESHOE NOTCH

突出部放进刹车蹄片凹口

The fall tree limb leave a big indent on his car

掉下来的树枝在他的车上留下了一个大凹口

a concave shape with an open top.

顶上有开口的凹形物。

A bowl-shaped depression at the mouth of a volcano or geyser.

碗状凹陷火山口或喷泉口的碗状凹陷处

The recess can be open to the top, with the integral blade subassembly being lowered into the recess, or the recess can open to the bottom, with the integral blade subassembly being raised into the recess.

凹穴开口向上时，整体的刀片组就下放入凹穴；凹穴开口向下时，整体的刀片组就往上塞入凹穴。

Pits on either side of the mouth may have been sense organs.

口部两侧的凹陷可能具有感觉器官。

The sum of one land and groove impression is 0.165 inches.

一个槽脊与凹槽坡口的总长为0.165英寸

cabled flutings

卷绳饰缺口的柱面凹槽饰纹

Each garage is like a hole with a box shape ( rectangular entrance ).

每个泊位像一个箱形的凹洞（矩形入口）。