这些真空包装的食品在纽约州有售，人们发现在竹荚鱼加工处理前没有进行内脏处理。

The vacuum sealed plastic packs of the fish were sold in New York state and were found to have been uneviscerated before processing.

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第二章详细介绍塑料包装西式火腿中邻苯二甲酸酯类增塑剂的前处理方法，包括提取及净化方法。

The second chapter introduces the plastic packaging Ham phthalate plasticizers in the pre-treatment methods, including extraction and purification methods.

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产品包装图象的预处理是产品编码定位与识别前最关键的一步。

A very important step before location and recognition is the pre-processing of the product package image.

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