1.
Countersunk or chipped rivet symbol. Use in conjunction with other rivet ends.
埋头或有凹口的铆钉符号。与其他铆钉端点结合使用。
2.
a concave shape with an open top.
顶上有开口的凹形物。
3.
notch-tow barge
凹尾驳(尾部有顶推凹口
4.
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。
5.
has V-shaped notch for pulling off boots.
有V形凹口以便脱靴子的装置。
6.
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
7.
A ridge between the indentations of a fluted column.
木折在饰有凹槽的柱子的缺口间的棱条
8.
a plane having cutters designed to make the tongues and grooves on the edges of matchboards.
有用来制作企口板板舌和凹槽的刀具的刨子。
9.
"Any of several species (genus Carduelis, family Carduelidae) of songbirds that have a short, notched tail and much yellow in the plumage."
金翅科金翅属的几种鸣禽。尾短,有凹口,羽衣较黄,
10.
notch on a serrated edge
锯齿形边缘的凹口.
11.
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
12.
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
13.
A small cavity in the earth, especially one containing ore.
凹地地球的小凹穴，尤其含有矿石的凹穴
14.
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。
15.
rear gunsight having an open notch instead of a peephole or telescope.
在瞄准器的后部有一个开着的凹口取代了原来的窥视孔或望远镜。
16.
Printing done with a plate bearing an image in intaglio.
凹版印刷用刻有凹版图形的模具印刷
17.
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
18.
We examine the valleys and the floors of craters with great interest and care.
我们饶有兴趣且小心翼翼地察看了火山口的凹槽和地层。