...pipe reduction; inner grooved tube; tube sinking; pushing force; surface [gap=25480]关键词：回转模锻；径向锻造；阶梯管；管端缩径；内沟槽管；缩管；进给推力；表面粗糙度 ...
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brake pipe pressure reduction 制动管减压量
train pipe pressure reduction [铁路] 列车管减压量
air reduction of train pipe 列车管减压量
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