hinged clam-shell construction

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• Dredging — Dredge redirects here. For other uses, see Dredge (disambiguation). Dredgers redirects here. For the German municipality, see Dreggers. Dredging is an excavation activity or operation usually carried out at least partly underwater, in shallow… …   Wikipedia

• Dump truck — For other uses, see Dump truck (disambiguation). A dump truck (or, UK, dumper truck) is a truck used for transporting loose material (such as sand, gravel, or dirt) for construction. A typical dump truck is equipped with a hydraulically operated… …   Wikipedia

• Seashell — A seashell, also known as a sea shell, is the common name for a hard, protective outer layer, a shell, or in some cases a test , that was created by a sea creature, a marine organism. The shell is part of the body of a marine animal, in most… …   Wikipedia

• mollusk — molluskan, molluscan /meuh lus keuhn/, adj., n. mollusklike, adj. /mol euhsk/, n. any invertebrate of the phylum Mollusca, typically having a calcareous shell of one, two, or more pieces that wholly or partly enclose the soft, unsegmented body,… …   Universalium