Release date: 2009-04-13
Recently, American scientists have developed a new product for the diagnosis and treatment of pancreaticobiliary e…
Abalone mushroom, also known as Taiwanese mushroom. In plant taxonomy belongs to Basidiomycotina, Lamystrophy, Agaricales, Pleurotus, Pleurotus. It is a rare and precious species that occurs during the high temperature season and has a high food value and …
Symptoms mainly occur in the southern region of China. The affected plants were dwarfed and the leaves were discolored and the growth was degraded. The color of the leaves was orange to yellow. Indica is mostly orange or slightly red, and it is also called red lea…
Dear friends, everyone is happy to introduce to you today the importance of melons, especially the cultivation of Hami melon, the methods of grafting and the focus of grafting. These are my experiences in the past two years. Share with you. Useful places may wish to refer to and need impro…
American pheasants are commonly known as pheasants and pheasants and are one of the most important hunting birds in the world. With the improvement of the people's living standards, pheasant husbandry has already had a place in the poultry industry and it is sti…
1) Butterfly valve is a kind of valve that opens, closes and adjusts the fluid passage by reciprocating about 90 degrees with a disc type opening and closing …
Check valve is check valve
The check valve is only used to prevent the flow medium fr…
The first fault is that the safety valve is leaking. The main reason is
(1) The contact surface between the valve core and the valve seat is not tight;
(2) There is dirt on the contact surface between the valve core and the va…