While many simple plumbing tasks can be completed with a few common hand held tools, other more complex jobs require specialised tools, designed specifically to make the job easier.
虽然许多简单的管工工作可以只靠几种常用的手持工具来完成，但那些更复杂的工作则需要专门的工具，这些工具是专门设计的，它们能使这些工作变得更加容易。