roentgen rays (protection devices against ), not for medical purposes
Related Translations:
防护: protect; shelter; shield; guard; shielding; protection; proofing 短语和例子人体防护 [军事] physical protection; 防护植物不受阳光直接照射 shelter a plant from direct sunlight; 这个村庄有一条河防护着。 the village was defende
