Thoroughly clean all parts exposed to material, including piston barrel, piston head, O-ring, one-way valve, filling head, feeding tank, hopper, etc. Damaged seal shall be immediately replaced.

应彻底清洗所有和物料接触的部件，包括活塞缸、活塞头、O型圈、单向阀、灌装头、料桶、料斗等，发现破裂损伤的密封应及时进行更换。

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At one week of age, 10% of the formula group was still using formula in some way as part of their feeding strategy compared to 47% of the group originally assigned to breast-feed but who added formula.

CNN: How formula could increase breast-feeding rates