A双舌≥11mm,双舌(钢门)9mm,单舌12mm
B双舌≥10mm,双舌8mm,单舌14mm
C双舌≥12mm,双舌(钢门)9mm,单舌12mm
D双舌≥11mm,双舌(钢门)9mm,单舌10mm
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