- fixed bobbin
- 固定筒子
English-Chinese lightIndusrty dictionary (英汉轻工业大词典). 2013.
English-Chinese lightIndusrty dictionary (英汉轻工业大词典). 2013.
bobbin — A decender that opens to enclose the rope around two fixed pulleys. May have a handle ( STOP ) which must be squeezed to allow descent [25] … Lexicon of Cave and Karst Terminology
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