求翻译：为确保油罐清洁，油罐及输油系统应定期清洗，输油胶管两端内外接头应经常涂抹润滑油，拆装时轻松方便。油管每次工作完毕后，均应及时盖上进、出口外端盖（堵盖），输油胶管两端（堵盖），以保证管内清洁。是什么意思？

To ensure that the oil tank cleaning, oil tank and oil transportation systems should be cleaned regularly, inside and outside the ends of the transmission oil hose connector should always scribble lubricants, easily reassembled. Tubing after each work shall cover mobility, outside the cover in a timely manner (plug cover), both ends of the transmission oil hose (plug cover), to ensure that the pipe cleaner.