chain tongs

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a pipe wrench used for turning large pipes;
an adjustable chain circles the pipe with its ends connected to the head whose teeth engage the pipe
• Usage Domain:
plural, plural form
• Hypernyms:
pipe wrench, tube wrench
• Hyponyms:
chain wrench
• Part Meronyms:
chain