When calculating of natural loads assume, that expansion joints on machines and ducts cannot transfer loads.
当计算自然荷载时，设备间、管道间和设备与管道间的膨胀节不传递自然荷载。
Methods the dilated metallic ducts designed by ourselves were applied to drain the acute pyogenic arthritis, including 8 knee joints and 3 ankle joints.
方法用自行研制的金属扩张套管置管引流治疗急性化脓性膝关节感染8例，踝关节感染3例。
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