He was among the pioneers in the use of aluminum for furniture, and his contribution included improvements and patents to facilitate [______] production.
동의어 · crowd, multitude, throng파생어 · massive(거대한)
★ 주제문 — S1·S2·S4·S6이(가) 이 문장을 떠받칩니다 — S3을(를) 맥락(으)로 뒷받침