The results show that general tendency of snowdamage increases, specially in the late winter.
结果表明：雪灾的总趋势是增加的，特别是后冬，这可能是对全球气候变暖的响应。
2
Area caused by wind and snow blizzard of snowdamage is a serious road traffic safety impact of a natural disaster.
风雪地区雪害尤其以风吹雪造成的雪害是严重影响公路交通安全的一种自然灾害。
3
Head structure defects of 7738 umbrella-type tower are presented after snowdamage. Improvement methods are introduced and check-up calculation of load is made.