Modelau Trenau Eraill 3D

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Modelau Trên 3D Eraill ymlaen Flatpyramid.

Although traditionally the word “train” was associated with rail transport, it appeared much earlier than the first steam locomotives (1804). Thus, according to the Dahl dictionary, the word “train” comes from the word “trip” and originally meant a series of carts following each other – in this sense the word is preserved, in particular, in the phrase “wedding train”.

In the future, with the development of rail transport, the word “train” began to be applied to it. In the same Dahl dictionary one can come across such a definition: “A railroad train — how many locomotives are lucky, or what is coupled together, into one whole.” The definition also includes a group of interlinked cars – the train.

Mae'r diffiniad a roddir yn y geiriadur o Brockhaus ac Efron, eisoes yn nodi presenoldeb yng nghyfansoddiad yr unedau tyniant:
Train – crews linked together to follow the railway. Usually P. is composed of a number of cars, driven by a locomotive placed in the head.

Wrth i'r defnydd o gludiant wedi'i dynnu gan geffylau leihau, collodd y gair “trên” ei ystyr wreiddiol (“rhes o gartiau”) yn raddol a daeth yn gysylltiedig yn unig â'r rheilffordd.
Trên rheilffordd, ei ffurfio a'i gyplysu o'r ceir gydag un neu fwy o locomotifau neu geir modur sy'n bodoli eisoes, gyda signalau adnabod golau ac eraill.

Yn olaf, mae'r Rheolau ar gyfer Gweithredu Rheilffyrdd yn Dechnegol yn rhoi diffiniad swyddogol tebyg o'r gair “train,” ond gyda'r amod canlynol:
Mae cerbydau heb geir, ceir, ceir rheilffordd a cheir rheilffordd o fath sefydlog, a anfonir i'r llwyfan, yn cael eu hystyried fel trên.

Felly, yn y cysyniad swyddogol, ni ellir galw pob trên yn drên; yn ei dro, nid yw presenoldeb ceir yn hanfodol ar gyfer y trên.