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We've mainly produced many types of marine fittings with a completed list of specifications as per such standards as JIS, DIN ANSI and BS, including flanged valve, steel stop valve and angle valve, iron stop valve and angel valve , storm valve, fire valve, air plug and filter.

本公司主要生产日本标准JIS。以及DIN，ANSI，BS等标准的船用法兰阀门，铸铁截止阀/角阀。铸钢截止阀/角阀，防浪阀。消防阀，闸阀，蝶阀，德标/美标蝶阀及配件等，并且代理美国GRACO气动隔膜泵，气动柱塞泵，高压清洗泵。

We've mainly produced many types of marine fittings with a completed list of specifications as per such standards as JIS, DIN ANSI and BS, including flanged valve, cast steel stop valve and angle valve, cast iron stop valve and angel valve , storm valve, fire valve, air plug and filter.

本公司主要生产日本标准JIS。以及DIN，ANSI，BS等标准的船用法兰阀门，铸铁截止阀/角阀。铸钢截止阀/角阀，防浪阀。消防阀，闸阀，碟阀，德标/美标蝶阀及配件等，并且代理美国GRACO气动隔膜泵，气动柱塞泵，高压清洗泵。

We've mainly produced many types of marine fittings with a completed list of specifications as per such standards as JIS, DIN ANSI and BS, including flanged valve, cast steel stop valve and angle valve, cast iron stop valve and angel valve , storm valve, fire valve, air plug and filter.

公司主要专业生产经营多种种类，规格齐全，主要生产日本标准JIS。以及DIN，ANSI，BS等标准和船用法兰阀门，铸铁截止阀/角阀。铸铁截止阀/角阀，防浪阀。

We've mainly produced many types of marine fittings with a completed list of specifications as per such standards as JIS, DIN ANSI and BS, including flanged valve, cast steel stop valve and angle valve, cast iron stop valve and angel valve , storm valve, fire valve, air plug and filter.

本公司主要生产日本标准JIS。以及DIN，ANSI，BS等标准的船用法兰阀门，铸铁截止阀/角阀。铸钢截止阀/角阀，防浪阀。消防阀，闸阀，蝶阀，德标/美标蝶阀及配件等，气动隔膜泵，气动柱塞泵，高压清洗泵。

We've mainly produced many types of marine fittings with a completed list of specifications as per such standards as JIS, DIN ANSI and BS, including flanged valve, cast steel stop valve and angle valve, cast iron stop valve and angel valve , storm valve, fire valve, air plug and filter.

本公司主要生产日本标准JIS。以及DIN，ANSI，BS等标准的船用法兰阀门，铸铁截止阀/角阀。铸钢截止阀/角阀，防浪阀。消防阀，闸阀，蝶阀，德标/美标蝶阀及配件等，并且代理美国GRACO气动隔膜泵，气动柱塞泵，高压清洗泵，空气帽，等一系列产品。

We've mainly produced many types of marine fittings with a completed list of specifications as per such standards as JIS, DIN ANSI and BS, including flanged valve, cast steel stop valve and angle valve, cast iron stop valve and angel valve , storm valve, fire valve, air plug and filter.

本公司主要生产日本标准JIS。以及DIN，ANSI，BS等标准和船用法兰阀门，铸铁截止阀/角阀。铸钢截止阀/角阀，防浪阀。消防阀，闸阀，碟阀，德标/美标蝶阀及配件等，并且代理美国GRACO气动隔膜泵，气动柱塞泵，高压清洗泵。

We've mainly produced many types of marine fittings with a completed list of specifications as per such standards as JIS, DIN ANSI and BS, including flanged valve, cast steel stop valve and angle valve, cast iron stop valve and angel valve , storm valve, fire valve, air plug and filter.

本公司主要生产日本标准JIS。以及DIN，ANSI，BS等标准的船用法兰阀门，铸铁截止阀/角阀。铸钢截止阀/角阀，防浪阀。消防阀，闸阀，蝶阀，德标/美标蝶阀及配件等，并且代理美国GRACO气动隔膜泵，气动柱塞泵，高压清洗泵。

We've mainly produced many types of marine fittings with a completed list of specifications as per such standards as JIS, DIN ANSI and BS, including flanged valve, cast steel stop valve and angle valve, cast iron stop valve and angel valve , storm valve, fire valve, air plug and filter.

本公司主要生产日本标准JIS。以及DIN，ANSI，BS等标准的船用法兰阀门，铸铁截止阀/角阀。铸钢截止阀/角阀，防浪阀。消防阀，闸阀，蝶阀，德标/美标蝶阀及配件等，并且代理美国GRACO气动隔膜泵，气动柱塞泵，高压清洗泵。空气帽。600mm航海平行尺等一系列产品。

When a sudden power failure or accident or normal pump stops when the pump stops, the valve inlet water velocity to reduce stress Agency, the valve plate also fall, when its velocity is zero (that is, inlet flow rate is zero Department), large valve plate because of its own gravity and rapidly turn off (time 3s ~ 5s), the majority of water to prevent backflow, when the valve before and after the formation of a water pressure, water stress, on the one hand through the small valve at the bottom of the three slot for pressure relief vent pressure. 4 water stress from the bypass tube into the cavity patch up the control room (this process for the suction pressure chamber that can effectively absorb the energy of water), when water stress on cavity than inferior vena cava, the pressure of water promote the diaphragm down mobile , the current cavity pressure of water being squeezed out all the small valve plate slowly drop back to standby status, the process time to ease closure adjustable (3s ~ 150s), then the valve has been fully closed, watertight.

当突然停电或事故停泵或正常停泵时，阀门进水口处压力水流速降低，大阀板也随之下降，当其流速为零时，大阀板由于自身重力而迅速关闭（时间3s～5s），可防止大部分水倒流，此时阀门前后形成一种水压差，压力水一方面通过小阀板底部的三条泄压槽进行泄压。4）压力水从旁通管进入膜片控制室上腔（此过程为吸压腔，能有效吸收一部分水能量），当上腔压力水大于下腔时，压力水推动膜片往下移动，当下腔压力水全部被挤出来时，小阀板缓缓下降，恢复到待机状态，此过程中缓闭时间可调节（3s～150s），届时阀板已全部关闭，滴水不漏。

When entering the diaphragm pressure on the top of the control room to the atmosphere or water by the downstream area of low pressure, the role of the bottom plate in the valve and the pressure below the diaphragm on the pressure value is greater than the top, so the main valve disc to the fully open position; when entering the diaphragm pressure above the control room can not water the lower reaches of the atmosphere or area of low pressure, the role of the diaphragm on the top of the pressure value is greater than the pressure below the value, so will the main valve pressure valve set to fully closed position; when the diaphragm pressure above the value of the control room at the entrance of the middle pressure and outlet pressure, the main valve in the regulator valve on the disk, and its regulation depends on the location of the needle-catheter system and adjustable valve guide of the role of joint control.

当阀门进入隔膜上方控制室内的压力水被排到大气或下游低压区时，作用在阀盘底部和隔膜下方的压力值就大于上方的压力值，所以将主阀阀盘推到完全开启的位置；当进入隔膜上方控制室内的压力水不能排到大气或下游低压区时，作用在隔膜上方的压力值就大于下方的压力值，所以就会把主阀阀盘压到完全关闭的位置；当隔膜上方控制室内的压力值处于入口压力与出口压力中间时，主阀阀盘就处于调节状态，其调节位置取决于导管系统中的针阀和可调导阀的联合控制作用。

Objective: To study the effect of polycythemia on blood oxygen saturation.

裴蕾目的：观察RBC剧增而引起的高粘血症对血氧饱和度的影响。

Based on SIMPLER algorithm in the curvilinear body-fitted coordinates, the calculations were performed for Pr=0.7, Re=10~1000 on non-orthogonal non-staggered grids which are generated by elliptic equation systems.

采用曲线坐标系下压力与速度耦合的SIMPLER算法，数值研究了周期性渐扩渐缩波纹通道内脉动流动与换热情况，流动Re数的范围为10~1000，Pr数为0.7。