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TC-4000型背投式投影机的银幕为40英寸,其画面为20英寸电视机的4倍,占地面积则与20英寸落地式电视机差不多,只有0.54平方米。此投影机
The TC-4000 rear projection projector has a 40-inch screen and four times the size of a 20-inch TV, occupying just about 0.54 square meters of floor space with a 20-inch TV set. This projector