D is CAM wheel pole driving, spring automatic restore structure, tight structure, reasonable design, stable driving, dust discharge and dependable air lock.

D为凸轮连杆传动，弹簧自动复位机构，结构紧凑、设计合理、运转平稳，卸灰、锁气可靠。

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Still, the cabin hovers in my imagination as a finished structure — tight and snug as a cedar chest, its timber frame pegged and mortised, and a fire ticking in the wood stove.

尽管如此，在我的想象里小屋就像一座已经完工的建筑一样盘旋着——像雪松衣橱那样牢固温暖，框架结构排列严密、钉榫相接，还有火焰在柴炉里噼啪作响。

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Consent forms for film and TV tend to follow a water-tight structure that is standard across the industry.

FORBES: Magazine Article