Topic When the weight which is used for fishing the root spending in the obstacle, the line just is fanned, offers the root evasion weight which designates that it passes through from the obstacle easily as yes.SolutionsForm of weight itself B of the metal make or the synthetic resin make, Chinese date tree die, football die, or the congruence cone, congruence elliptic gimlet forma and the abbreviation cylindrical shape where congruence multilateral plumb bob forma the chamfer of spherical condition is administered on the both ends of the ku cylindrical shape, being the abbreviation multilateral pilaster where the chamfer of the multilateral plumb bob is administered on the both ends of the multilateral cylinder, regarding the form which possesses the equatorial plane to designate the aspect ratio of the median profile which parallels to the longitudinal direction aspect ratio of median profile of the vertical, regarding other forms at least as 1.3 or more, in that computer B the hole for line complete penetrationC, is provided the center line which parallels to the transverse direction or, from that on top. When the line is fanned due to this structure, the ri where the root breadth of the computer which caught becomes narrower than width of the opening of the obstacle, does that obstacle the root catching can be evaded by the fact that it comes out. Choice figure Drawing 1
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