The film of oil between the rings and the liner is not only essential for the lubrication but also plays an important part in achieving ().
- Aan oil seal
- Bremoving heat
- Ca gas seal
- Dcooling the pisto
The film of oil between the rings and the liner is not only essential for the lubrication but also plays an important part in achieving ().
1、The purpose of the wearing rings used
The purpose of the wearing rings used in a centrifugal pump is to ().Aprevent an internal explosion in the pump when it is overheatedBenable...
2、The difference between measured and de
The difference between measured and desired values is called ().Amake-upBdesired valueCdeviationDset value
3、Between the steam dram and the smaller
Between the steam dram and the smaller water dram below, large numbers of smaller diameter () tubes are fitted.AfireBwater wallCgeneratingDdown comer
4、People between the ages of()and 70(65
People between the ages of()and 70(65 in Scotland)whose names appear on the electoral register,with certain exceptions,are liable for jury service and their names are chosen at random.A18B19C20D21
5、The coastline between Point Judith and
The coastline between Point Judith and Watch Hill is().Asteep with rocky bluffsBsandy and broken by rocky pointsClow and marshyDheavily forested
6、The distinction between competence and
The distinction between competence and performance was proposed by F. de Saussure.A正确B错误