| 21. | A minimum of three people are required for power block seining; the skipper, skiff operator, and corkline stacker.
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| 22. | The original Puretic power block was driven by an endless rope from the warping head of a winch.
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| 23. | Lever House marked Park Avenue's transformation from a boulevard of masonry mansions to power blocks of corporate identity.
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| 24. | The "'Puretic power block "'is a special kind of mechanised winch used to haul nets on fishing vessels.
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| 25. | "Right now, we are seeing huge unions that are becoming power blocks within the AFL-CIO, " said Chaison.
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| 26. | After the 1962 Cuban crisis a relaxation policy between the two power blocks in the Cold War came about.
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| 27. | The drum seine uses a horizontally mounted drum to haul and store the net instead of a power block.
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| 28. | This influence is seen in the Atlas Building, Securities Building, Power Block, and the Lewis and Clark County Courthouse.
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| 29. | Between 1969 and 1979, the Puretic power block was pictured on the reverse side of Canadian five dollar banknote issues.
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| 30. | The original power block he designed was essentially a simple winch which used a V-shaped roller coated with hard rubber.
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