Its a scam.
ERW: Electric Resistance Welding tube - tubes are rolled and joined With welding - fin cut is there CRW: Cold Drawn tube - without fin cut - Draw process
it took me forever to do so dont get frusterated u draw 2/3 of the outside triangle the do the inside triangle upside down then fin the outside one
William Bartram was the "flower hunter "' because he would travel by canoe and fin and draw different flower :D.
The fin on the back of an orca is called the dorsal fin.
If you mean a fin like a fish fin, there is a word, but mostlly each one is different; Lā (fin). Anal fin, kuaalo. Caudal fin, hiʻu. Dorsal fin, kualā. Pectoral fin, etc. If you mean fin, like 'the end', it is pau'ana.
The dorsal fin is the fin on the back of a fish, for example the typical triangular fin on the back of a shark is its dorsal fin.
An adipose fin is a soft, fleshy fin found on a fish behind the dorsal fin and ahead of the caudal fin.
Soup fin is shark fin used in making shark fin soup.
On a dolphin and most fish the fin behind the dorsal fin is the tail fin. Some fish, such as knife fish, have no dorsal fin or tail fin. Dolphins of course are mammals, not fish.
An abdominal fin is one of a pair of posterior fins in fish - the pelvic fin and the ventral fin.
The fin on the top/back of all fish is called the "Dorsal Fin."
Caudal fin, Dorsal fin, Pectoral fin, Ventral fin, and the fin.