等变压线

isallobar (line of equal pressure gradient)

class / rank / grade / equal to / same as / to wait for / to await / et cetera / and so on / et al. (and other authors) / after / as soon as / once

to change / to become different / to transform / to vary / rebellion

to press / to push down / to keep under (control) / pressure

see 壓根兒|压根儿[ya4 gen1 r5]

pressure crease / fig. to toil for sb else's benefit / line ball (i.e. on the line)

variant of 線|线[xian4]

thread / string / wire / line / CL:條|条[tiao2],股[gu3],根[gen1] / (after a number) tier (unofficial ranking of a Chinese city)