后排气 meaning in English

final vacuum

After sample is preheated , it should be kept in mould for 20 - 40s and then breathing , the pressure is added at last
1 . 0注：模塑料预热后，可在模具中预压20 - 40秒后排气再加压。
After moulding material is preheated , must join the mould 20 - 40 second then exhaust air in mould to add again to press
1 . 0注：模塑料预热后，须在模具中合模20 - 40秒后排气再加压。
Note : after moulding material is preheated , must join the mould 20 - 40 second then exhaust air in mould to add again to press
1 . 0注：模塑料预热后，须在模具中合模20 - 40秒后排气再加压。
Note the compression condition may be difference , because the shape , dimension , and usage of produce were difference , the condition adjustment must under the premise that did not reduce the product quality
注：模塑料预热后，须在模具中合模20 - 40秒后排气再加压。
Engine , the fuel consumption decreases by about 19 . 1 % . on the other hand , the fuel consumption of quasi - homogenous mixture lean combustion decreases by about 6 . 5 % compared with homogenous lean mixture combustion . three - ways catalyst ( twc ) + optimizing afr technology is used to remove nox emissions in oxygen containing exhaust gas
本研究运用三效催化器+空燃比优化控制技术，利用三效催化器能一定程度降低nox排放的特点，控制发动机在优化空燃比下工作，将稀燃后排气中剩余不多的nox进一步催化。