분사구문인가요?

We have continued to evolve and expand, maintaining our premier position in the food industry, but expanding into beauty and household products.

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우리는 계속해왔다. 발달과 확장하는것을, maintaining부터 분사구문으로 들어간거같은데 무슨 접속사가 생략된건가요? 분사구문이 되기 전 문장으로 바꿔주시고 설명해주시면 감사하겠습니다

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접속사 while 생략

We have continued to evolve and expand, while we are maintaining our premier position in the food industry, but expanding into beauty and household products.

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