// `pattern:` [SPEC 15.4]: grid copies locate by their seed hole, radial copies
// by their ring centre — each copy repeats the full lowering (every hole
// punches and centre-marks), and a radial pattern draws its `|pitch-circle|`
// through the copies.
|row| { gap: 40 } [
|drawing#plate-view| "COVER PLATE" [
|rect#plate| { width: 120; height: 70 }
|hole#pin| { width: 10; translate: -35 -20; pattern: grid(2, 2, 70, 40) }
]
|drawing#flange-view| "FLANGE" [
|oval#flange| { width: 80; height: 80 }
|hole#hub| { width: 24 }
|hole#bolt| { width: 8; pattern: radial(6, 28) }
]
]