In order to utilize hydrogen halides, such as hydrogen chloride gas, in the manufacture of electronic devices, it is essential that the hydrogen halide contain {HEAD ~ low amounts} of {TAIL ~ retained water vapor} or moisture, i.e. less than 0.5 ppm water 
In order to utilize hydrogen halides , such as hydrogen chloride gas , in the manufacture of electronic devices , it is essential that the hydrogen halide contain { HEAD ~ low amounts } of { TAIL ~ retained water vapor } or moisture , i.e. less than 0.5 ppm water
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