长期保持低调
has long maintained a low profile
高温长期氧化
high temperature long-term oxidation
一年内到期长期借款
Long term loans due within one year
一年内到期长期应付款
Long term payable due within one year
保温保湿
heat and moisture insulating
thermal insulation and moisture retention
保温保湿试验
test on thermal insulation and moisture holding
保温保压
maintenance of temperature and pressure
heat preservation and maintaining pressure
保温保压筒
pressure and temperature coring system
降温保温工艺
Heating Technology of Reducing Temperature Plus Preservation
阶梯升温保温
step raising and holding temperature
蜗壳保温保压
spiral case with desirable resistance to water temperature and pressure