咒语：Technical illustration of German Sturmtiger assault gun, 3D main model rendered in matte finish with classic WWII color scheme (dark yellow, olive green, rust red accents), retro engineering aesthetic with visible rivets and weld seams, placed centrally on pure white background. Surrounded by hand-drawn pencil sketches of key components: 380mm mortar barrel cross-section, track links with measurement callouts, ammunition loading mechanism in exploded-view diagram, hand-written technical annotations with precise dimensions (e.g. ‘380mm RW61 L/5.4’ in vintage typeface), schematic of reinforced frontal armor (150mm@60°), weathered blueprint-style arrows pointing to critical features, graphite shading showing mechanical details, sketchpad texture with subtle paper grain, technical drafting symbols, aligned in circular composition around central render –v 7.0 –s 150
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