经常航行在狭窄、弯曲及水势复杂航道的船舶，还 配有尾锚（stern anchor），必要时用以控制船尾 的摆荡。 如果船舶应配备的锚链总节数成单数，则右锚多配 一节。
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证明了新型粗尾锚杆可以解决顶板锚杆破断问题。
It is verified that roof bolt broken problem may be solved with new type's thick tail bolt.
分析了普通金属锚杆存在的问题，并提出新型金属粗尾锚杆可以很好地解决这方面存在的问题。
Analyzed the problem that exist in suspension roof support, and presented the new type strong steel big-end bolt can solve this problem.
装上大钳锚头绳和钳尾绳，钳尾绳的外径至少是大钳锚头绳的两倍。
Install the make-up line (s) and snub line to the rig tongs. The snub line should be at least twice the size of the tong line.
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