Akwai nau'ikan fall-matsin lamba guda uku masu matsin lamba: fuskar sileging, ta dace da karancin matsi, lokutan da ba su dace ba. Concave da convex sealing surface, dace da dan kadan high matsa lamba lokatai; Tenon da tsagi sealing surface, dace da flammable, fashewar, mai guba kafofin watsa labarai ...
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