"用拉幅机绷布" can be translated into English as "stretching fabric on a tenter frame" or "tentering fabric with a tentering machine".
Here, "拉幅机" is translated as "tenter frame" or "tentering machine," which refers to the equipment used for stretching and fixing the width of fabric during the finishing process. "绷布" is translated as "stretching fabric" or "tentering fabric," indicating the action of applying tension to the fabric to maintain its desired dimensions.