求翻译：用清洁纸清擦电缆线芯绝缘层表面并涂抹硅胶脂，将复合管居中对称套在两端应力管之上。由中间向两端加热固定是什么意思？

Wipe with a clean paper clear of the cable core insulation surface and the smear of silicone grease, the composite tube center symmetry in the top of the tube of the both ends of the stress. From the middle to both ends of the heating fixed

Wipe with a clean-up cable wire insulation surface and apply silicone grease to the composite tube centered symmetrical set at both ends on stress management. By the middle to the end heat retention

Scratches the electric cable line core insulating layer surface clear with the clean paper and spreads wipes the silicon mastic, comes between the symmetrical wrap the multiple-unit tube above the both sides stress tube.Heats up fixedly by among to the both sides

Cleaning paper cleaning clean the cable core insulation layer and apply silicone grease on the surface, Center the pipe over symmetric stress at both ends pipe. From the middle to the ends of heat fixing

正在翻译，请等待...