base casing head landing  基本炼费; 孔底基本炸药

head landing zone  磁头定位区; 磁盘停放区域

soft-landing head  软降落磁头

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

400m obstruction of the crossing and landing  渡海登岛400m障碍

Abnormal Landing  非正常返回着陆; 非正常着陆

abort landing  落地未成

absorber of landing gear  起落架缓冲器

accuracy landing  定点着陆; 准确落地