Field joint coating shall be performed only when the surfaces to be coated are clean and dry, and in the absence of airborne contamination that can affect the quality of the joint coating.
只有当将要涂敷的表面清洁，干燥且无空气污染时，才可以进行补口涂敷，这些因素都可能影响补口涂层的质量。
These microorganisms can all be part of normal skin flora; hence, direct inoculation at the time of the operation as well as airborne contamination are the most likely causes of these infections.
这些微生物都可以是正常皮肤菌群的一部分，因此，手术过程中的直接种植和空气传播的污染是这些感染的最可能的原因。
These microorganisms can all be part of normal skin flora; hence, direct inoculation at the time of the operation as well as airborne contamination are the most likely causes of these infections.
这些微生物都可以是正常皮肤菌群的一部分，因此，手术过程中的直接种植和空气传播的污染是这些感染的最可能的原因。
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