1 m' Q% H; e, s, \7 h單式彎紗single sinking
" e d2 Z! C0 x) R0 E復式彎紗sinking and dividing 有回退式彎紗sinking with robbing4 c$ Y% m6 s3 r) g1 P$ G' A `$ }
無回退式彎紗sinking without robbing 夾持式彎紗sinking with clamping3 j8 E. i" i; o3 v4 X/ F) k$ j4 N/ N
非夾持式彎紗sinking without clamping 5 R0 ^4 @: |: G- R. C' R
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