เครื่องถูกปิดผนึกอย่างแน่นหนาเพื่อกักเก็บสารมลพิษเอาไว้ That Have has served me Acquire objective facts on their extensive-expression purifying effectiveness and any mechanical degradation. It's got also served me make informed judgments on factors such as ease of routine maintenance and Procedure, the presence or not enough distracting noises or lights, and easy visual influence—the ... Successfully Submitted (Awaiting Approval)