方眼紙のようなシームレスな模様の背景素材（アスペクト比16:9）
Schlüsselwörter
graph paper,
grid,
16,
9,
white background,
vector,
illustration,
seamless,
pattern,
background,
material,
square,
square,
stationery,
stationery,
form,
paper,
graphic,
dot,
pattern,
grey,
grey,
pattern,
design,
paper,
document,
background,
textured,
scale,
design,
image,
grating
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