It is malleability that allows metal to deform permanently under compression without rupture.正是展性使金属在压力下永久变形而不断裂.In severe cases, it can deform joints and cripple its victims.严重的病例, 可使关节变形,使病人残废.Shoes that are too tight ...
A two piece packing gland prevents cocking and stem damage.两件式填料压盖防止压盖翘起和阀杆损坏.Gland – two piece self - aligning gland and gland flange eliminates cocking if packing adjustment is required.压盖–两件式自行调整压盖及压盖法兰,在调整填料时,不需要压簧杆....