国产麻豆一区二区三区v视界|蜜臀av少妇一区二区三区|夜夜嗨av一区二区三区免费区|人妻久久久精品麻豆av

Supports

Fujian Longxi Bearing (Group) Corporation Limited?-?Supports?-?Technical Information?-?Sealing
Sealing

????Most  of  the bearings must  be equipped with seals to prevent  the dirt  and moisture from entering.  The efficiency of the sealing has a decisive influence to the service life of the bearing. LS seal has two types, see table 12.