Take a look at the meaning of these two tills (water flushing before driving)

1# echommm until the discharge water is clean ------FYI

Connect the hose from the utility station to bring the filtered water to V-xx, flush D-1234 from the return line until the clean water is discharged. Check whether the meter can give true value. Check the liquid tank and distributor in the tower and confirm that there are no operation and drainage problems. When the discharged water is clean water, then close the water supply, drainage and manholes in sequence. Can the two red sentences in this passage "til the drain water is clean" be understood in this way? The first is relative to D-1234, and the second is relative to flushing in the tower.

till the drain water is clean until the drain water is clean

(echommm) What actions/operations until...? The first action refers to Flush. . . and drain at V-xxx until clear water comes out. The second action is to wait until clean water is discharged, then close all water supplies, drains and all manholes.

This post was last written by lihx_susan edited on 2010-3-31 08:22 Personal understanding of the usage of till: When the verb before till is a continuous verb (such as wait, dance, talk, eat), it is better to say "until...". The word till is preceded by a negative voice, or a negative meaning, and the verb is a non-continuous verb. It can also be said "until...". For example: They danced till midnight. They danced till midnight. He didn't leave the office till 8 o'clock. But when the verb before till is a non-continuous verb, it is difficult to say "to", it means "(until) to." . . (time)", e.g.: The meeting adjourned till five o'clock. The first till above uses flush/drain as a continuous verb, which can be understood as "until...", while the second till should be understood as "waiting until the water becomes clear, you can do other things."

last sentence: Then close water supply, drains and all manholes till the drain water is clean. The original translation is as follows: Then close the water supply, drain valve, and all openings until the drained water becomes clean. until means that an action continues until a certain moment before stopping. If the last sentence is translated literally, it does not make sense from a technological perspective (turn off the water inlet/outlet of the system, how to flush? ). If the English is rewritten, there will be no misunderstanding: Then close water supply, drains and all manholes when the drain water is clean. OR, Until the drain water is clean, close water supply, drains and all manholes. Adapted translation: Then wait until the discharged water becomes clear, and then close the water supply, drain valve, and all openings. Thank you for your participation! :handshake:handshake

1# echommm What operation/action...is the end of? Operation/Action:flush the column until clean water is discharged

Although the post has been closed, I still want to express some personal opinions. till... can we understand it this way?: Until the drainage becomes clear, then turn off the water supply, seal the drain outlet and all manholes.

Hose connect filtered water from utility stations to V-xx. Flush D-1234 from the reflux line and drain at V-xxx till the drain water is clean. Check if the instruments can give realistic values. Check collector and distributor in the column; make sure there is no operation and drain problem. Then close water supply, drains and all manholes till the drain water is clean. Based on the above understanding, I will publish a personal translation, basically agreeing with Clauspolunit: Connect the hose from the utility station to direct the filtered water to V-xx until the drainage becomes clean. Flush D-1234 from the return line and drain outlet on V-xxx. Check whether the meter can give actual value. Check the liquid tank and distributor in the tower and confirm that there are no operation and drainage problems. When the discharged water is clean water, then close the water supply, drainage and manholes in sequence. Note that till is used throughout the original text, not until.

See how English dictionaries view the similarities and differences between till and until: http://dictionary.reference.com/browse/till till 2 (tĭl) prep. Until. conj. Until. Usage Note: Till and until are generally interchangeable in both writing and speech, though as the first word in a sentence until is usually preferred: Until you get that paper written, don't even think about going to the movies. · Till is actually the older word, with until having been formed by the addition to it of the prefix un-, meaning "up to." In the 18th century the spelling 'till became fashionable, as if till were a shortened form of until. Although 'till is now nonstandard, 'til is sometimes used in this way and is considered acceptable, though it is etymologically incorrect.