The double direction Thrust ball bearings can support bi-directional loads.
在双向推力球轴承可以承受双向的负载。
With exocylic double bonds the effect of strain is in the opposite direction .
环外的双键的张力效应导致相反的结果。
Two arch ribs are installed in transversal direction to form a"double bow system".
四川绵阳飞云大桥的主桥系三跨系杆拱桥，横向设两根拱肋，构成“双弓体系”。
Two arch ribs are installed in transversal direction to form a"double bow system".
四川绵阳飞云大桥的主桥系三跨系杆拱桥，横向设两根拱肋，构成“双弓体系”。
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