They help to prevent bunching, folding and wrinkling, and keep the kimono's layers in alignment. The main symptoms are an upward curling, puckering, and bunching of leaves. This phenomenon is sometimes known as "clumping" or "bunching". Bunching small wires before concentric stranding adds the most flexibility. The mall allowed better spacing of streetcars, reducing the problem of streetcar bunching. They are designed to prevent burns to the wrist, while preventing bunching and remaining flexible. To reinforce the bunching, a klystron may contain additional "buncher" cavities. The plant is a low-growing, tufted, hairless grass, with a bunching (or tillering) growth habit. It is a diploid hybrid between the bunching onion and the shallot. One necessitates several additional assumptions here, including small boson bunching probability and efficient error postselection. Bus bunching serves to reduce the effectiveness of buses as a transport mode. Another possibility is based on the bunching property of indinguishable photons. The first resonator causes bunching of the particles passing through it. This reduced tram bunching and improved reliability of tram services. The bunching process is done at the start of the linac, using several 'bunching' cavities.