选用

Spring safety valve spring force and rely mainly on the work of another spring-loaded safety valve in the closed and not closed, generally flammable, explosive or toxic media should use closed, steam or inert gas used is not closed type, in the spring-loaded safety valve in there with a wrench and without wrenches.

弹簧式安全阀主要依靠弹簧的作用力而工作，弹簧式安全阀中又有封闭和不封闭的，一般易燃、易爆或有毒的介质应选用封闭式，蒸汽或惰性气体等可以选用不封闭式，在弹簧式安全阀中还有带扳手和不带扳手的。

Mainly depend on spring-loaded safety valve spring and the work force, and spring-loaded safety valve in the closed and non-closed general flammable, explosive or toxic media should be chosen behind closed doors, steam or inert gas can be chosen, such as closed type, in the spring-loaded safety valve with wrench in there and without wrench.

弹簧式安全阀主要依靠弹簧的作用力而工作，弹簧式安全阀中又有封闭和不封闭的，一般易燃、易爆或有毒的介质应选用封闭式，蒸汽或惰性气体等可以选用不封闭式，在弹簧式安全阀中还有带扳手和不带扳手的。

Spring-loaded safety valve spring force which mainly rely on the work of another spring-loaded safety valve in the closed and non-closed, generally flammable, explosive or toxic media should be used enclosed, steam or inert gas, etc., may selection is not closed, in the spring-loaded safety valve with a wrench in there and without wrench.

弹簧式安全阀主要依靠弹簧的作用力而工作，弹簧式安全阀中又有封闭和不封闭的，一般易燃、易爆或有毒的介质应选用封闭式，蒸汽或惰性气体等可以选用不封闭式，在弹簧式安全阀中还有带扳手和不带扳手的。

Gas valve body material selection Pressure gas pipeline under the reasonable use of the valve housing material selection, not only palace to meet the safe operation of pipeline and is able to reduce the cost and make the best use for the purpose.

三、燃气阀门的阀体材质选用根据燃气管线的使用压力合理选用阀门壳体材质，既宫满足管线的安全运行又能达到减少造价，物尽其用的目的。

Removable seat preference should be given, because they are easy maintenance, and easy to replace the valve seals Swing check valves should be used one kind of screws or bolts to connect the valve cap for inspection and repair of disc and seat.

可拆卸的阀座应优先选用，因为它们容易维修，而且便于更换阀中的密封件旋启式止回阀应该选用一种螺丝或螺栓连接的阀帽，以便检查和修理阀瓣和阀座。

The trial breakfast chose the tube-fed diet for diabetics, in which partial rice was replaced by proper amounts of low DE maize maltodextrin to decrease its viscos...

两种早餐的总热能，蛋白质、脂肪、碳水化合物的供能比均基本相同，但试验早餐选用糖尿病管饲膳食(含一定量的低DE值玉米麦芽糊精替代部分大米)，使膳食的粘稠度降低；而对照早餐选用稠厚的匀浆膳，不含麦芽糊精。

When lubricant of other trade-mark is chosen, it shall be antioxidant, heat-resisting, antirust, of stable

当选用其它润滑脂时，应注意选用抗氧化，耐热性、防锈性、化学稳定性均好，并添加了抗挤压剂

The selection principles are: 1, high temperature, Bellow seal stop valve acc.

其选用原则是： 1、高温、高压介质的管路或装置上宜选用截止阀。

Power supply wire receptacle should choose AC220V/10A triplex wires independent receptacle, choose high quality receptacle, avoid bringing high frequency electro spark when poor contact with plug, causing detector working instability.

D 、 供电线路插座选用 AC220V/10A 三线独立插座，应选用质量较好的插座，避免与插头接触不良产生高频电火花，引起检测器工作不稳定。

Power supply wire receptacle should choose AC220V/10A triplex wires independent receptacle, choose high quality receptacle, avoid bringing high frequency electro spark when poor contact with plug, causing detector working instability.

iv。 供电线路插座选用 AC 220V/10A 三扁独立插座，应选用质量较好的插座，避免与插头接触不良产生高频电火花，引起检测器工作不稳定。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐