One of the rigging. Of commonly used shack on the domestic market, according to the production standards generally divided into three categories national standard, American standard, Japanese standard; The most commonly used with target, because of its small volume weight capacity is big and widely used. By type can be divided into G209 (BW), G210 (DW), G2130 (BX), G2150 (DX). According to the type can be classified as the bows type (omega) with mother shackle and type D (U type or straight type) type D take mother shackle; According to the use place can be divided into two kinds of Marine and land use. Safety factor four times, five times, six times, even eight times (e.g., GUNNEBO super shackle of Sweden). Its material, common carbon steel, alloy steel, stainless steel, high strength steel, etc. Generally divided into galvanized surface treatment (hot) plating and electroplating, painting, plating dacromet (Dacormet).
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