A single piece() fitted with bronze rings guides the piston in the cylinder liner.
A、piston skirt
B、piston crown
C、guide way
D、cross-head
A、piston skirt
B、piston crown
C、guide way
D、cross-head
A、unusually solid welded B、never be solid forged C、almost invariably solid forged D、almost invariably be welded
A、Use either 1 or 2 tiers of dunnage,spacing the pieces in each tier a foot apart,and lay pieces in the bottom tier diagonally to the ship's side B、Use 1 tier of dunnage,laying the pieces tightly together to form a solid floor over the steel deck C、Use 2 tiers of dunnage,spacing the pieces in the bottom tier about a foot apart and the pieces in the top tier 6 inches apart D、Use 2 tiers of dunnage,spacing the pieces in the bottom tier about a foot apart and the pieces in the top tier together
A、FIT AP与无线控制器之间直接相连,用于小型的FITAP网络 B、FIT AP与无线控制器之间跨越L2层网络组网 C、FIT AP与无线控制器之间跨越L3层网络组网 D、FIT AP与无衔控制器之间跨越广域网组网