Protostellar system HH212 as observed by ALMA Cycle 0 in band 7. Upper panel: 850 μm continuum (turquoise contours) overlaid on SiO(8–7) integrated between –23 and +15 km s^-1 (colour scale and black contours), compared with the systemic velocity V_sys (see text). First contours at 5σ (6 mJy beam^-1 for continuum and 270 mJy beam^-1 km s^-1 for SiO) in steps of 20σ (continuum) and 5σ (SiO). The ellipse shows the synthesised continuum HPBW ( at PA = 51°). The beam HPBW of the SiO map is (PA = 49°). Bottom panel: contour plot of the C¹⁷O(3–2) emission (turquoise) overaid on the of the C³⁴S(7–6) emission (colour and black), both integrated in the V_sys ± 6 km s^-1 range. The HPBW is (PA = 49°). First contours and steps correspond to 5σ (50 mJy beam^-1 km s^-1 for C³⁴S and 65 mJy beam^-1 km s^-1 for C¹⁷O).