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"NGK." Fullformexpand.com, https://www.fullformexpand.com/ngk/5498. Accessed 16 Feb. 2026.
Fullformexpand.com, 2026. "NGK." Accessed February 16, 2026. https://www.fullformexpand.com/ngk/5498.
"NGK." (n.d.). Fullformexpand.com. Retrieved February 16, 2026, from https://www.fullformexpand.com/ngk/5498.
NGK. (2026). Fullformexpand.com. Available at: https://www.fullformexpand.com/ngk/5498 (Accessed: 16 February 2026).