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木上における最終作業がウッドデッキと手すりです。
The final work on the tree is a wood deck and a handrail.
ビスがまっすぐに打てるように目印の糸を張って穴を空けます。
The string of the sign is put to strike the machine screw straight and the hole is cleared.

ビスの頭の皿が表面に出ないように専用のドリルで穴を加工します。
The hole is processed so that the plate of the head of the machine screw should not go out to the surface by a special drill.

入り口のウッドデッキは、少し下げました。
The wood deck at the entrance was lowered a little.
地表の建築と異なり、ツリーハウスの床とウッドデッキのレベル差が取れないので
雨の進入対策はこれぐらいしか出来ません。
Only recently, because the level difference between the floor and the wood deck in the tree house cannot be taken unlike the construction of surface of the earth, the going into it measures of rain can be done.