| 摘要 |
A penetrating oil comprises from about 1 to about 5 parts of a formula oil comprising a lubricating oil and surface active agents, the lubricating oil having a viscosity of about 135 to about 220 SSU. The formula oil is mixed with 20 parts to about 30 parts of hydrocarbon-based viscosity controller having a viscosity of from between about 75 to about 200 SSU and from about 65 to about 80 parts of a hydrocarbon-based volatility controller having a viscosity of from between about 30 to about 45 SSU.
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