The （） of the lubricant should be sufficient to hold the film together, but it should allow the lubricant to flow easily.<br>A:specific gravity<br>B:viscosity<br>C:acid value<br>D:calorific value

The （） of the lubricant should be sufficient to hold the film together, but it should allow the lubricant to flow easily.
A:specific gravity
B:viscosity
C:acid value
D:calorific value

出自：海船船员证

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