extension head  扩展头; 扩展首部

extension of fetal head  胎头仰伸

extension set [= extension telephone set]  分机; 副[电话]机

item extension and sequence extension pruning  项扩展和序列扩展剪枝

hammer head [= hammer head shark]  双髻鲨; Y髻鲨

head to head  对遇; 交头接耳地

head to head configuration  头对头结构

head to head structure  头接头结构

head wind [= head sea]  逆风; 顶[头]风; 逆浪

head-to-head  肉搏战

head-to-head polymer  头-头聚合物

hexagon socket countersunk head cap head screw  内六角沉头螺钉

hexagon socket head cap head screw  内六角圆柱头螺钉

Round head rivets with small head--Black  小半圆头铆钉

snap head rivet (round-head rivet)  圆头铆钉

Super Suction Head And Big Variable Head  大变幅超吸程

(strongly) excellent extension  (强几乎)优越扩张

Ⅰ crack extension  Ⅰ型裂纹扩展

3D modling extension  三维实体造型

60 years life extension  延寿60年