There is national standard, trade standard and local standard in China, which include the maximum limit of harmful metal, nonmetal elements, nitrate, nitrite and pesticide residues.
我国蔬菜产品安全质量标准有国家标准、行业标准及地方标准几大类，标准内容包括有害金属、非金属元素、硝酸盐和亚硝酸盐及农药残留的最大限量值。
There is national standard, trade standard and local standard in China, which include the maximum limit of harmful metal, nonmetal elements, nitrate, nitrite and pesticide residues.
我国蔬菜产品安全质量标准有国家标准、行业标准及地方标准几大类，标准内容包括有害金属、非金属元素、硝酸盐和亚硝酸盐及农药残留的最大限量值。
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