英语翻译工厂查了当时的出库记录,确定他们是按照合同数量发了30件,而且他们的包装是每箱装10筒,每筒装3件,如果少了一筒

"The factories checked the outgoing report of the time, and made sure that they sent out 30 items in accordance with the contract.Also,according to their packing standard,there are 10 pots in each box and three items in each pot.The box won't be filled up if there is one pot left and the packing staff will discover that.So they are sure to deliver 30 items."
因为不知道具体是什么东西,可能我的容量单位选择不太恰当.还望有帮助!
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