本发明涉及基板载具，包含主支架、副支架、第一托盘和第二托盘。
The invention relates to a substrate carrying tool, comprising main brackets, auxiliary brackets, a first tray and a second tray.
介绍了一种套筒型补偿器———自平衡补偿器，它可用在热力管网中消除主固定支架的盲板力。
Describes a sleeve type compensator-the self balancing compensator, which can be used in heating networks to eliminate the blind flange force on primary fixing trestles.
主拱为桁架式双拱肋，钢管拱纵向分13段制造，采用无支架缆索吊机安装、钢绞线斜拉扣挂施工。
The steel pipe arch was manufactured in 13 segments vertically, erected by cable crane without support and clasped by diagonal tension steel strand.
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