。
Our company imports machine parts.
Literal
Our-company [topic-は] machine parts' import [object-を] conducting is.
弊社 is the humble term for 'our company' — used in business communication. 機械パーツ mixes Japanese 機械 (machine) with the English loanword パーツ (parts). 輸入を行う is a formal variant of 輸入する — adding 行う makes it more business-register.