1.
They are wearing masks because the air is toxic.
因为空气里有毒，他们都戴着防护面具。
2.
half-mask respirator
半面罩式呼吸防护器
3.
a protective covering over a mattress to protect it.
套在褥子外面用来保护褥子的防护罩。
4.
To protect or guard the flank of.
防守侧面掩护或保卫…的侧翼
5.
Protect the bottom heads of acetylene cylinders from damp ground.
保护钢瓶底部，防止接触潮湿的地面。
6.
A baseball umpire wears mask and chest protector so he won't run the risk of being hit by the ball.
棒球裁判戴着面具护甲，以防被球击中。
7.
I'm going to put all power in the front shield.
我要所有动力都用在前面防护网
8.
helmet (goalkeeper)： Used to protect head and face.
头盔（守门员用）：用来防护头部和面部。
9.
Study on the Protective Electroless Plating of Sintered NdFeB Magnets;
烧结NdFeB磁体的化学镀表面防护研究
10.
Study on Surface Protection of Sintered Nd-Fe-B Permanent Magnets;
烧结型Nd-Fe-B永磁体表面防护的研究
11.
The problems and new materials in conservation of historic stone structures;
石质文物表面防护中的问题和新材料
12.
Design and Implementation of Computer Security Defence System
计算机桌面安全防护系统设计与实现
13.
Corrosion and protective measure after a large quantity of "spreading salt"
雪后路面大量“撒盐”的危害及防护措施
14.
The Current State and Prospect of High-powered Fibers Applied to Individual Prospective Equipments
汉麻在个体防护装备方面的应用展望
15.
Efficient Protection Distance and Area of Farmland Protective Forest in Karamay
克拉玛依农田防护林带的有效防护距离与面积研究
16.
Protective experimental research on spray polyurea on concrete faced rock fill dam surface
混凝土面板坝表面喷涂聚脲防护试验研究
17.
6 As for all machined surfaces without protective paint, metal protector or grease should be applied to avoid serious rustiness.
6对于所有机械加工的未涂防护漆的表面，应涂上金属防护剂或油脂，以防严重生锈。
18.
Safety requirement: Hardhats, Safety Glasses, Dust Mask, Face Shield, Ear Muff, and etc.
必须佩戴下列个人防护用品：安全帽、安全眼镜、面罩、防尘面罩、护耳器等.