Make the polyether and polyurethane up and make the material serial JY-5351 polyurethane up and make the polyether up (the building is used and shaped in succession ) JY-4351 polyurethane makes the polyether up (suitable for preparing the freezer in spraying) JY-4352 polyurethane makes the polyether up (is it is it prepare material board to pour into to suitable for), JY-4353 polyurethane make up material (is it prepare pipeline to suitable for ) , JY-4354 polyurethane makes the material up (suitable for the water heater, the refrigerator) JY-4355 polyurethane makes the material up (suitable for preparing and is able to bear the high-temperature foam) JY-4356 polyurethane makes the material up (suitable for the wrappings) JY-4357 polyurethane makes the material up (suitable for 141b foam foam of pharmaceutical), JY-4358 polyurethane make up material (suitable for high fire-retardant foam ) , JY-4359 polyurethane make material up(suitable for hard to steep soles)