difference with the high pressure passage 414 so as to quickly restrict the second vane 440 may be formed at an opposite side to the high pressure passage 414 the vane chamber 413 connected to the common side connection pipe 530 to be explained later may have a certain inner volume accordingly even if the second vane 440 has been completely moved backward so as to be received inside the second vane slot 411 the rear surface of the second vane 440 may have a pressure surface for a pressure supplied through the common side connection pipe 530 the high pressure passage 414 as shown in fig5 and 6 may be positioned at a side of the discharge guiding groove not shown of the second cylinder 410 based on the second vane 440 and may be penetratingly formed toward a center of the second vane slot 411 from an outer circumferential surface of the second cylinder 410 the high pressure passage 414 may be formed to have a two step narrowly formed towards the second vane slot 411 using a two step drill an outlet of the high pressure passage 414 may be formed at an approximate middle part of the second vane slot 411 in a longitudinal direction so that the second vane 440 may perform a stable linear reciprocation a sectional area of the high pressure passage 414 may be equal to or narrower than a pressure surface applied to a rear surface of the second vane 440 via the vane chamber that is a.