STEP 1: How much weight do you want to push?
第1步:你需要多少推力的开窗器?
STEP 2: Where will you install electric actuators ?
第2步:你将在哪里安装电动开窗器?
STEP 3: Which type of windows are you going to install electric window openers ?
第3步:你打算安装哪种窗户?
STEP 4: Select controller for your electric window opener.
第4步:为电动开窗器选择控制器。