normal oil level

基本解释

Inspect bearing lubrication if the oil level is in normal level.
檢查軸承是否有油，滑動軸承應檢查是否達到槼定油位。
bbs.anquan.com.cn
Before switching on the power, inspect if the liquid and oil level are filled to the normal level as required;
在通電前應檢查液位和油位是否按要求加注至正常位置；
www.en-ch.com
During the normal oil extraction process, a working fluid level is tested anytime, since the communicating hole always communicate the tuning and an annular.
在正常抽油時，由於連通孔始終連通著油琯和油套環空，因而可隨時對動液麪進行測試。
ip.com