求翻译：(2)室外冷媒管的保护。室外冷媒管除要做好保温层外，还要防止意外损伤，室外冷媒管裸露长度>lm时，必须加扣板进行保护。是什么意思？

(2) outdoor refrigerant pipe protection. In addition to doing outdoor refrigerant pipe insulation, but also to prevent accidental damage, exposed outdoor refrigerant pipe length> lm must increase pinch protection.

( 2) outdoor refrigerant pipe protection. Outdoor refrigerant pipe insulation layer in addition to doing a good job, it is also necessary to prevent accidental injury, outdoor refrigerant pipe length > LM nudity, when GEM for protection must be detained.

(2) outdoor Leng Mei tube protection.Outdoor Leng Mei the tube besides must complete the heat insulating layer, but also must prevent the accident damages, when outside Leng Mei tube exposed length >lm, must add buckles the board to carry on the protection.

(2) protection of outdoor refrigerant pipes. Outdoor outside the refrigerant pipe in addition to insulation, but also to prevent accidental injury, when outdoor refrigerant pipe length bare >LM, must be buckles the Board for protection.