Learn about how you can start your marine biology training right at community college! If you have a love of the ocean and a fascination with the creatures that live within its depths, a career in marine biology might be the right choice for you.
1 Ladder chain, a light wire chain used with sprockets for low torque power transmission. 2  Lavatory chain, the chain attached to the cistern of an old-fashioned W.C. in which the flushing power is obtained by a gravity feed from above-head height.
It is important to note that the two methods are different (i.e. they are based on different rules) and they are NOT interchangeable, see below for an example. The cis- / trans- style is based on the longest chain whereas the E/Z style is based on a set of priority rules. You need to know both styles.