食品級紙餐盒的尺寸偏差測量是一個精確的過程，通常遵循以下步驟進行：
　　The measurement of size deviation of food grade paper lunch boxes is an accurate process, usually following the following steps:
　　一、測量工具
　　1、 Measurement tools
　　使用精度為0.02mm的游標卡尺作為測量工具，以確保測量的準確性。
　　Use a vernier caliper with an accuracy of 0.02mm as the measuring tool to ensure the accuracy of the measurement.
　　二、測量部位
　　2、 Measurement location
　　分別測定紙餐盒的底部長邊、底部短邊以及斜高這三個關鍵部位的尺寸。
　　Measure the dimensions of the bottom long side, bottom short side, and diagonal height of the paper lunch box separately.
　　三、測量過程
　　3、 Measurement process
　　取樣：從待測的紙餐盒批次中隨機選取一定數量的樣品，通常每個樣品需要測定5個試樣，以提高數據的可靠性和準確性。
　　Sampling: Randomly select a certain number of samples from the batch of paper lunch boxes to be tested. Usually, 5 samples need to be tested for each sample to improve the reliability and accuracy of the data.
　　測量：使用游標卡尺對每個試樣的底部長邊、底部短邊和斜高進行測量，并記錄測量值。
　　Measurement: Use a vernier caliper to measure the bottom long side, bottom short side, and slope height of each sample, and record the measurement values.
　　計算：計算每個試樣測量值的最大值、最小值與平均值的差值，這個差值即代表了該試樣的尺寸偏差。然后，對所有試樣的尺寸偏差進行統計分析，得出該批次紙餐盒的尺寸偏差范圍。
　　Calculation: Calculate the difference between the maximum, minimum, and average values of each sample measurement, which represents the size deviation of the sample. Then, statistical analysis was conducted on the size deviation of all samples to determine the size deviation range of the batch of paper lunch boxes.
　　四、判定標準
　　4、 Judgment criteria
　　根據具體的標準或合同要求，對測量得出的尺寸偏差進行判定。一般來說，底部長邊和底部短邊的偏差應在±2mm以內，斜高偏差則為±3mm（這一標準可能因具體的產品要求而有所不同，因此在實際操作中應參照相關標準或合同規定）。
　　Based on specific standards or contract requirements, determine the dimensional deviation obtained from measurement. Generally speaking, the deviation between the long and short sides of the bottom should be within ± 2mm, and the deviation of the inclined height should be ± 3mm (this standard may vary depending on specific product requirements, so relevant standards or contract provisions should be referred to in actual operation).
　　五、注意事項
　　5、 Precautions
　　在測量過程中，應確保游標卡尺的精度和準確性，避免由于測量工具的問題導致測量誤差。
　　During the measurement process, the accuracy and precision of the vernier caliper should be ensured to avoid measurement errors caused by problems with the measuring tool.
　　取樣應具有代表性，能夠真實反映該批次紙餐盒的尺寸偏差情況。
　　The sampling should be representative and able to truly reflect the size deviation of the batch of paper lunch boxes.
　　測量時應注意避免對紙餐盒造成損壞或變形，以確保測量結果的準確性。
　　When measuring, attention should be paid to avoiding damage or deformation to the paper lunch box to ensure the accuracy of the measurement results.
　　通過以上步驟，可以精確測量食品級紙餐盒的尺寸偏差，并依據相關標準或合同要求對其進行判定。這對于確保紙餐盒的質量穩定性和滿足客戶需求具有重要意義。
　　Through the above steps, the size deviation of food grade paper lunch boxes can be accurately measured and judged according to relevant standards or contract requirements. This is of great significance for ensuring the quality stability of paper lunch boxes and meeting customer needs.
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