(1) B130—o-ring,

(1) B132—o-ring,

(1) B141—y-ring,

(1) B142—o-ring,

(1) B144—o-ring,

(1) B145—dust ring,

(1) B150—dust ring,

(1) B151—y-ring,

(2) B126—copper washer,

(2) B120—copper washer.

(1) A304—dust ring,

(1) A305—seal,

(1) A323—seal,

(1) A325—seal,

(1) A326—o-ring,

(1) A327—dust ring,

(1) A331—o-ring.