Cast iron carrier rings, () machined grooves, are provided for all the pistons.
Cast iron and gunmetal fittings are used freely in small sizes at moderate pressure; large fittings, those for high pressure and temperature are cast or mild steelIn the above sentence, the word “those” means ().
At the top of the A-frames there is a strong cast iron frame called ().
iron-sulfur proteins, Fe/S protein (铁硫蛋白)
"Cast iron has poor corrosion resistance to sea water, especially in the presence of bronzes" Implies().
The cast iron()for the cross-head are attached to the top section and seal off the crankcase.
Wrought iron has an inherent resistance to corrosion but is not to be had freely , its place has been taken by the cuprous alloysAccording to the above sentence , which of the following statements is true?()
The iron mike is a(n) ().
The Schuyler and Livingston Iron Works has been working on getting its network security under control.It has set up VPN with IPSec links to its suppliers. It has installed network vulnerability scanners to proactively identify areas of weakness, and it monitors and responds to security events as they occur. It also employs extensive access control lists, stateful firewall implementations, and dedicated firewall appliances. The company has been growing very fast lately and wants to make sure it is up to date on security measures. Which two areas of security would you advise the company to strengthen?()
At the top of the A-frames there is a strong cast iron frame called ().