甜瓜支架的靛藍技術圖

An elegant technical blueprint illustration of a small three-legged melon stand, one single perspective diagram, fine ivory construction lines on indigo paper, visible fastening joints and subtle dimension ticks without numbers or labels. Single standalone horizontal 3:2 image.

小型三腳甜瓜支架的優雅技術藍圖插畫，單個透檢視、靛藍紙上細象牙施工線，可見緊固接點與細尺寸刻線，無數字標籤，獨立橫向3:2。