The space (11) is equipped with bend tube (17), the outer cylinder and the inner cylinder are opened with hole (5) which is equipped with water inlet pipes.
在空间(11)内装有弯管(17)，在外筒、内筒上制有孔(5)，孔内装有进水管等。
2
Optimization are done on some photonic structures, through the introduction of a new air-cylinder in bend finally we have got a comparatively good light propagation outcome.