exterior face
2.When condole of PVC of choose and buy carries profile on the head, besides should ask for qualitative check report and product to detect to agency besides certificate of approval, can quality of range estimation exterior, board face should level off is smooth, flawless, without knock against, can tear open outfit freely, exterior luster does not have nick, the knock that use a hand board face sound is ringing.
3.we live truly difficultly, one needs to withstand all sorts of exterior pressure, must face own innermost feelings the confusion. in struggles with hardship, if some people cast the vision which to you understood, you will feel that perhaps one kind of life the warm feeling, only will have the short glance, sufficiently will cause me to feel exerts.
4.The acting force on the hole wall produced from the swing of exterior pad in the RCLD system was affected by the swinging speed of control face,the center angle of hole on the high-pressure valve and the rotary speed,when the control face swings in the clockwise direction or anti-clockwise direction.
