Overlay of the PdBI maps of the 2.7 mm (left panels) and the 1.4 mm (right panels) continuum emission (contours) on the CH₃CN (6–5) emission (grayscale) averaged under the K = 0, 1, 2, 3, and 4 components (left panels) and CH₃CN (12–11) emission (grayscale) averaged under the K = 0, 1, 2, and 3 components (right panels) towards the cores G10.62–0.38, G19.61–0.23, and G29.96–0.02. The contour levels are 3, 9, 18, 27, 39, 51, and 75 times σ, where 1σ is 17 mJy beam^-1 at 2.7 mm and 26.7 mJy beam^-1 at 1.4 mm for G10.62−0.38, 6 mJy beam^-1 at 2.7 mm and 33.3 mJy beam^-1at 1.4 mm for G19.61−0.23, and 3 mJy beam^-1 at 2.7 mm and 6.7 mJy beam^-1 at 1.4 mm for G29.96−0.02. Grayscale levels are 3, 5, 10, 15, 20, 30, and 40 times (36 for G10) σ, where 1σ is 15 mJy beam^-1 at 2.7 mm and 15 mJy beam^-1 at 1.4 mm for G10, 30 mJy beam^-1 at 2.7 mm and 50 mJy beam^-1 at 1.4 mm for G19, and 15 mJy beam^-1 at 2.7 mm and 65 mJy beam^-1 at 1.4 mm for G29. The synthesized beam is shown in the lower righthand corner. The white cross marks the position of the 1.4 mm continuum emission peak. The source B seen towards G19.61−0.23 at 2.7 mm is the UC Hii region B observed by Furuya et al. (2005).