protective agent 保护剂 ; 防护剂 ; 抗氧化剂 ; 监督代理人
skin protective agent for worker 劳动护肤剂
Molten Solder Protective Agent 锡熔液保护剂
Metal lustre protective agent 金属护光剂
Collapse prevention wall protective agent 防塌护壁剂
comprehensive protective agent 综合型防护剂
Protective agent for furnace shutdown 停炉保护剂
coenzyme a protective agent 辅酶a保护剂
For example, if a plant needs protection against a leaf-feeding pest, the protective agent need not also be present in the grain (that's harvested for food).
例如，如果一种作物需要保护免于遭受一种以叶子为食物的害虫的侵害，保护剂不需要在（作为粮食而收割的）作物中出现。
Must never use unknown protective agent, in order to avoid not only short of protection, which increases landscape stone maintenance problems.
决不可使用来路不明的防护剂，以免不但达不到防护效果，反而增加了景观石保养的困扰。
The quality of the protective agent must pay special attention to.
防护剂的品质一定要特别注意。
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