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| 齿轮油; 美国石油学会齿轮油分级代号美国石油学会对车用齿轮油共分六级： GL1〜GL6。GL1使用性能最低,GL6最高,目前常用 GL3(普通齿轮油)、GL4(中负荷齿轮油)、GL5(重负荷齿轮油)。GL3不能用于双曲线齿轮，GL4〜GL6适用于双曲线齿轮 | |||
| 齿轮润滑剂 | |||
| 齿轮润滑油 | |||
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gear lubricant : 14 phrases in 6 subjects |
| Automobiles | 4 |
| Chemistry | 1 |
| Oil / petroleum | 2 |
| Oil processing plants | 1 |
| Technology | 5 |
| Wind Energy | 1 |
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