青云英语翻译
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[translate] The test machine drive screw to maintain lubrication, quarterly grease once;
Test driving is adopted to maintain lubrication, once per quarter plus lubricating grease;
The experimental engine drive lead screw must maintain the lubrication, each quarter should add lubricant one time;
Test-drive screw to keep it lubricated every quarter, the grease should be once a year;
Test driving is adopted to maintain lubrication, once per quarter plus lubricating grease;
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