Аннотация
Objects with the B[e] phenomenonexhibit permitted and forbidden emission lines dueto the presence of circumstellar ionized gas andlarge infrared excesses due to processing of thestellar radiation by circumstellar dust. There arefive groups of stars that show this phenomenon(pre-main-sequence Herbig Ae/Be stars, symbioticsystems, proto-planetary nebulae, some supergiant,and FS CMa type objects). The latter group is themost recently discovered and the least explored. Theleading hypothesis about the group nature impliesthat they are mostly intermediate-mass binary sys-tems, whose circumstellar medium was created duringa strong mass-transfer phase due to a Roche lobeoverflow of the more massive star in the system. Wehave been conducting a large program of spectroscopicand photometric observations of many objects andcandidates to this group. The current report isdevoted to the preliminary results of our ongoingstudy of two objects with similar underlying earlyB-type stars, FS CMa (the group prototype) and MOCam. The objects show different emission-line profilesand infrared excesses which are most likely due todifferent tilt angles of their non-spherical envelopeswith respect to the line of sight. Variability of spectrallines is discussed here.