2. Fragility of bamboo

 Bamboo is a weak material to bend comparing to the rattan.  
However, my father is able to knit perfectly with the single material and there's no broken section.

 In case that bamboo material is broken , it is usual to use a different bamboo with the part where bamboo is crossed.  Of course, my father never admits such a treatment.
As for the work of my father, when you try to see the work through the light, you can find that the stitch crossed is doing a uniform hinge.  In case of using another bamboo, it should be seen with blacker than other parts.

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Director Hideaki Kosuge  Postmaster@i-OfficeK.com