求翻译：按油牌号规定选用液压油，加油之前油液必须过滤，定期化验油质，合理更换，一般每年换油一次并更换吸油口滤油器.是什么意思？

Use as required by oil grade hydraulic oil, fuel oil must be filtered before, are regularly conducted by oil quality, reasonable replacement, General oil change once a year and replace the oil suction of oil filter.

Chosen by oil brand provides hydraulic oil, fuel oil must be filtered before oils, periodic testing, reasonable replacement oil every year, and in general a suction and replacement oil filter .

According to the oil trademark stipulated selects the hydraulic fluid before, refuels the fat liquor must filter, the regular chemical examination oil material, the reasonable replacement, general every year trades oil one time and replaces blots the mouth oil filter.

Use as required by oil grade hydraulic oil, fuel oil must be filtered before, are regularly conducted by oil quality, reasonable replacement, General oil change once a year and replace the oil suction of oil filter.

Use as required by oil grade hydraulic oil, fuel oil must be filtered before, are regularly conducted by oil quality, reasonable replacement, General oil change once a year and replace the oil suction of oil filter.