A PHP Error was encountered

Severity: Notice

Message: Constant APP_ID already defined

Filename: database/translate.php

Line Number: 15

Backtrace:

File: D:\database\translate.php
Line: 15
Function: define

File: D:\wwwroot\seor-china.com\application\controllers\news.php
Line: 194
Function: include_once

File: D:\wwwroot\seor-china.com\index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: Notice

Message: Constant SEC_KEY already defined

Filename: database/translate.php

Line Number: 16

Backtrace:

File: D:\database\translate.php
Line: 16
Function: define

File: D:\wwwroot\seor-china.com\application\controllers\news.php
Line: 194
Function: include_once

File: D:\wwwroot\seor-china.com\index.php
Line: 315
Function: require_once

磨辊旋转密封?-McAfer International Trading (Shanghai) Co., Ltd.

磨辊旋转密封?

2024-04-13

磨辊的密封首先空气密封,通过密封风机向磨辊内部鼓入空气,使其呈正压状态,阻止外部粉尘进入;

而在磨辊轴上还必须安装O型或剖分式密封圈,它与旋转部分接触,既要阻止油的泄露也要阻挡外部粉尘的侵入,因此材质要求较高。

以上答案仅供参考。

来源:备件网

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