单词	petcock
释义	petcock /ˈpɛtkɒk / noun A small valve positioned in the pipe of a steam boiler or cylinder of a steam engine for drainage or testing.They were fitted with a dial gauge, a vent port in the form of a petcock or counterweight, and a safety fuse.... This time I put a piece of tape over the petcock opening instead of using the screw on block off plate I had made to use on the first steps. Steam for ten minutes, then shut off the steam by either closing the petcock or dropping the weight gauge into place.
随便看	fisticuffs fist pound fist pump fistula fistular fistulous fit fitch Fitchburg fitched fitchew fitchy fitché fit for a king (or queen) fit for purpose fitful fitfully fitfulness fit in fit into fit like a glove fitly fitment fitna fitnah

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