| 摘要 |
This invention is directed to apparatus for removing sludge from the bottom of the tanks of an oil tanker and includes a hoisting winch at the top of the tank with its cable extending down into the tank and attached to a sludge scoop initially remotely located at the bottom of the tank. An adjustably positioned snatch block is used to control the lead of the cable and to establish the desired path of travel of the sludge scoop.
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