front overlap
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叠门；搭接：顾名思义搭接就是将一片衣片缉缝到另一片衣片上去。
Lapping: As the name suggests one section is lapped over a second section.
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门扇、门套应在室内用垫板垫平叠放、门套与门扇分开叠放；
Pile the door leaf and the door pocket indoors with tie plates evenly and separately;
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