在一些系统中,油液表面的泡沫不会造成很大的损害,但泡沫的存在说明相当量的空气滞留在油液当中。
In some systems, foam at the surface may not cause a lot of damage, but the presence of a foam layer normally indicates extensive air entrainment.
在一些系统中,油液表面的泡沫不会造成很大的损害,但泡沫的存在说明相当量的空气滞留在油液当中。
In some systems, foam at the surface may not cause a lot of damage, but the presence of a foam layer normally indicates extensive air entrainment.
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