coquille

CONT: Sur la benne Hulett, les deux coquilles n'ont par un axe de rotation commun, mais sont suspendus par chaînes et manivelles.

CONT: Rather than the two sides of the (...) [clamshell bucket], the orange peel [bucket] (...) has four, five or more leaves. These spade-shaped leaves with their reinforced digging points, are usually made for a tight, accurate fit when closed.