The intensity of the secondary radiations is weak compared with the intensity of the primary X-ray beam, and some of it, too, may not escape from the material.

这些次级放射线的强度跟原始x射线相比较弱，而且其中的一部分可能留在了那种物质中。

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The utility model can avoid the occurrence that fish can easily escape from the hook as the rod is lifted manually; meanwhile, labor intensity of people can be reduced;

它可避免了因人为抬竿造成鱼容易脱钩的现象，同时还可减轻人的劳动强度；

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