Това са думите examples, свързани с coal-tar. Щракнете върху която и да е дума, за да отидете на страницата с подробности за думата. Или, отидете на дефиницията на coal-tar.
In cutting off the loose bark, the edges should be made smooth before the coal tar is applied.
When dry, the outer layer of cement should be covered with coal tar to prevent cracking.
From there he went on to study the chemistry and technology of dye making, most especially to attempt a general classification of coal tar dyes for staining purposes.
It is only a product of coal tar.
Natural phenol is a product of coal tar, which is a by-product of the carbonisation of coal.
Complete particulars of the output of coal tar in this country are not available.
During the same period the registered imports of coal tar amounted to 3,065 tons.
Over a period, the water combines with the coal tar pitch to produce chemicals known as polycyclic aromatic hydrocarbons.
Is it not a fact that the workers handling coal tar have to take special precautions against ill-effects on their health?
At the same time, a considerable increase has been achieved in the completeness of the extraction of important by-products from gas and coal tar.
Some of the colours in the proposed permitted list are of natural origin, some are synthetic dyes derived mainly from coal tar.
The use of coal tar in jam-making is not advocated nor referred to in the leaflet.
If a mouse is treated with coal tar once and is then treated again that counts as two experiments.
Polycyclic aromatic hydrocarbons, which are linked to cancer, are to be found in the coal tar lining of many of the older water supply pipes.
We do riot recommend coal tar disinfectants for use in all circumstances in outbreaks of foot-and-mouth disease.
The following statement shows the quantities of intermediate coal tar products used in the manufacture of dyes, etc.
The use of certain coal tar dyes is already prohibited.
