求翻译：在常压常温下液压油中含有容积比为6～8%的空气，当压力降低时空气会从油中游离出来，气泡破裂使液压元件“气蚀”，产生噪声。大量的空气进入油中将使“气蚀”现象加剧，液压油压缩性增大，工作不稳定，降低工作效率，执行元件出现工作“爬行”等不良后果。另外，空气还会使液压油氧化，加速油的变质。防止空气入侵应注意以下几点：是什么意思？

Hydraulic fluid at atmospheric pressure and room temperature, the volume contains more than 6 to 8% of the air, when air pressure decreases, freed from the oil bubble burst so that the hydraulic components "cavitation" noise. A lot of air into the oil will "cavitation" phenomena have intensified, hy

under normal temperature at normal pressure hydraulic oil contains volume than to 6 to 8 percent of the air, the pressure drop in the oil from air bubbles burst, drifted away from the components of hydraulic pressure loss" and "gas generated noise. Large quantities of air access to oil will make the

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