求翻译：罐内真空负压可根据病人的耐受程度和病情随意调节，只需旋拧罐体上的手柄即可操作，使用起来更简单、方便，一看即懂，老少都能熟练掌握。是什么意思？

Vacuum tank according to the patient's tolerance and disease free to adjust, simply swirling the tank on the handle to operate, easier to use, convenient and a look that is understood, young and old can master.

In a cylinder vacuum negative pressure can be according to the patients' tolerance levels easy control and condition, simply cyclone, tank, use the handle can be operated with a more simple and easy to understand, young and old, can see that is familiar with.

In the pot the vacuum negative pressure may adjusts at will according to patient's tolerance degree and the condition, only must turn on lathe twists on the shell of tank the handle then to operate, uses is simpler, is convenient, as soon as looked namely understands, the whole families all can gras

Tank vacuum negative pressure can be adjusted according to the patient's tolerance level and disease free, simply swirling handle on the tank to operation, it is more simple, easy to use, understand, and young, are familiar with.

Tank vacuum negative pressure can be adjusted according to the patient's tolerance level and disease free, simply swirling handle on the tank to operation, it is more simple, easy to use, understand, and young, are familiar with.