box size

基本解釋

Material selection, export structure design, and box size design are the key issues and difficulties of Fenzhouxiang millet packaging.
材料選擇、倒出口結(jié)構(gòu)設(shè)計(jì)、盒型尺寸設(shè)計(jì)是汾州香小米包裝的重點(diǎn)與難點(diǎn)。
Wrought iron or steel scrap 1.4 inch and over in thickness individual pieces not over 60 inches x 18 inches (charging box size) prepared in a manner to insure compact charging.
厚度達(dá)到或者超過1/4英寸的的熟鐵或廢鋼，單件不得超過60 英寸x 18 英寸（裝料箱尺寸），以保證緊密裝箱的方式準(zhǔn)備好。
blog.sina.com.cn

As you can see above, the device is actually quite small, and most smartphones would have quite a bit of trouble fitting into a box that size.
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