Checks are also done on maintenance procedures to ensure that the process is being carried out properly and, if so, whether the system needs to be modified.

还要对维修工艺做检查以保证处理过程的正确，无论系统是否需要调整。

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The procedures are being carried out by consultant urological surgeon Mr Ghulam Nabi who specialises in keyhole surgery for diseases of the male and female urinary tract and the male reproductive organs.

BBC: Ninewells Hospital to use new keyhole surgery technique

However, over the last 15 years the rate of tonsillectomy has continued to fall, so much so that we are now in danger of too few procedures being carried out.

BBC: UK 'doing too few tonsil operations'