| 摘要 |
PROBLEM TO BE SOLVED: To provide a call-line installation weight capable of safely and smoothly installing a call-line in a river or the like.SOLUTION: A call-line installation weight 1 is installed in an end part of a call-line 50, and is used by installing the call-line 50 by flying to a distant place, and comprises an inside bag 10 having flexibility for storing liquid inside and an outer bag 20 having flexibility for storing the inside bag 10 inside together with gas. Thus, the call-line installing weight 1 safe even when touching a person, can be provided.SELECTED DRAWING: Figure 1 |
