Good hagglers always do a thorough inspection of anything they are interested in buying and if they find a flaw they will always ask for the price to be lowered.
砍价好手对他们感兴趣的东西，通常都会细细地检查一遍，如果他们发现了小瑕疵，他们就会要求降低价格。
2
A practical and effective ultrasonic inspection method for detecting internal flaw of brake disc is put forward and the key procedure is to select a proper probe.
提出运用超声检测的方法检测制动盘内部缺陷是切实可行的，而选择合适探头是超声检测成功的关键。
3
The algorithm of spatially selective noise filtration is used to reduce noise of X-ray image according to the feature of automatic inspection of ammunition flaw.