英语翻译[0021] On the other hand,within an axial closed end port

英语翻译
[0021] On the other hand,within an axial closed end portion of the clutch case 2,there is disposed a piston 30.When oil pressure is supplied into an oil chamber 13 defined between the piston and an inner wall of the clutch case 2,the piston 30 is shifted to the right in FIG.1 to closely tighten or engage the separator plates 4 and the friction plates 5 with each other through a wave spring 35 provided on a surface of the piston adjacent to the separator plate 4.Oil for the oil pressure is supplied to the oil chamber 13 through an oil port 25 formed in an inner diameter cylindrical portion of the clutch housing or case 2.
[0022] In order to prevent oil leakage,i.e.in order to maintain the oil chamber 13 in an oil-tight condition,a seal ring 33 is provided between the piston 30 and the clutch housing 2 and a seal 16 is provided in the inner cylindrical portion 22 of the clutch case 2.Further,when the oil pressure is released from the oil chamber 13,the piston 30 is pushed back by a repelling force of a return spring 14,thereby releasing or disengaging the friction engaging elements.The return spring 14 is supported by a snap ring 19 through a canceller 11 fitted in the piston 30 with the interposition of an O-ring 39.The other end of the return spring 14 is held by the piston 30 through a spring holder 28.