直钩
直钩-
姜子牙的钓法奇特，短竿长线，线系直钩，不用诱饵之食，钓杆也不垂到水里，离水面有三尺高，
but he would fish in an unusual way . He hung a straight fishhook , without bait , three feet above the water .
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GB/T10051.5-1988起重吊钩直柄单钩
Lifting hooks & Shank hooks with point
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经观察发现直臂、钩形臂和弧形臂是体操舞蹈动作中不可缺少的三种臂形；其中弧形臂尤为重要。
It is found through observation that straight , hooked and arc arm movements are three indispensable shapes in gymnastic dancing action and of which , arc arm shape is the most important one .