To keep the inside working parts of your engine clean, use engine oil and fuel that have tested engine cleaning properties.
为保持引擎内部工作部件的清洁，使用经检测具有清洁引擎性能的机油和燃料。
The foundations of shaft bearings of the main engine and aux engines shall be sufficient strength in consider easy for draining, cleaning and maintenance.
主辅机的轴承底座应该具有足够的强度，同时需考虑便于排水、清扫及维护。
The cleaning of gas is necessary to avoid wear and tear in engine.
清洁的天然气是必要的，以避免损耗发动机。
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