In the northern area, it is necessary to plant varieties which are outstandingly resistant to low winter temperature. 北部地区只能种植确实能抗冬季低温的品种。
The focuser has large anodized focuser knobs with rubber O-ring gripping surfaces for a firm grip and frostbite-free handling in cold weather. 那转接端已经用强氧化处理的表面镀膜为寒冷的天气坚定的紧握和级低温的稳定使用。
