社内調査の結果として汚れ起因は不明です。サンプルを2～3枚返却していた

社内調査の結果として汚れ起因は不明です。

サンプルを2～3枚返却していただけますか。
成分分析の検証を考えます。

次回、生産時には注意するよう指示しました。

Results (English) 1:

As a result of the internal investigation is stains caused by unknown.Sample 2-or 3 can be returned.Consider the validation analysis.Instructed to attention during the production the next time.

Results (English) 2:

Dirt caused as a result of the internal investigation is unknown. The 2-3 sheets and return to you please or sample. We think the verification of component analysis. Next time, was instructed to be careful at the time of production.

Results (English) 3:

The results of an internal investigation, and is not caused by dirt. Could you return to the sample 2 to 3. Think of the component analysis. Next time, too, was ordered to pay attention to the time of production.