冷光掠過鋼尺，把加工痕跡照清楚

One 3:2 precisionist product photograph of a closed brushed-steel caliper laid diagonally across dark blue stone. Cool hard light casts a long crisp shadow, revealing machined edges and subtle scratches. A small brass sphere rests near the jaws as a material contrast. Restrained industrial still life, accurate plausible tool geometry, no readable markings or watermark.

一張3:2精確主義產品攝影：閉合的拉絲鋼卡尺斜放在深藍石面上。冷調硬光投出長而清晰的影子，顯露加工邊緣與細微劃痕。鉗口附近放一顆小黃銅球作材質對照。剋制工業靜物，工具幾何準確合理，沒有可讀刻度或水印。