Injection pump 118 is preferably a peristaltic pump that is capable of various injection rates, as is conventionally known.Other types of variable injection rate pumps are also contemplated.

• 如一般所习知的，注射帮浦118最好使用具有不同注射速度的蠕动式帮浦，其他可变换注射速度的帮浦也可以考虑。