The 500 kgs of S-101 can be produced by December 30. But recently, one of my friends told me that "can be produced" will make your foreign clients confused about what you are saying, because "can be produced" in the above context only means that you produce that product, but not indicates whether the product/production can be finished by that particular date. -- No, but using 'can' does not necessarily indicate 'will'; it sounds as if you are awaiting a further commitment from your customer.
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