This permits fouled valve replacement with a new body cartridge, which will fit the old union nuts. No change in piping length is required.

这使得人们可以用新的阀腔更换肮脏的阀门，新旧管接螺母能够互相配合，不需要改变管道长度。

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Folded pocket knives with blades of less than three inches in length and cartridge-style razor blades are not covered by the legislation.

BBC: NEWS | UK | England | Derbyshire | Shops warned over knife sales